21. Some Symbolical Soup The obelus was first used by johann rahn (16221676) in 1659 in Teutsche Algebra.According to recent research, John Pell, who edited rahn s algebra, http://www.geocities.com/CollegePark/Field/7896/symbols.html

In the first spoonful, we find a Null Set symbol, which       looks like this:     Mr. André Weil who was born in 1906 and died this year     (1998) said in his autobiography that he introduced the     symbol: " Wisely, we had decided to publish an installment establishing the system of notation for set theory, rather than wait for the detailed treatment that was to follow: it was high time to fix these notations once and for all, and indeed the ones we proposed, which introduced a number of modifications to the notations previously in use, met with general approval. Much later, my own part in these discussions earned me the respect of my daughter Nicolette, when she learned the symbol for the empty set at school and I told her that I had been personally responsible for its adoption. The symbol came from the Norwegian alphabet, with which I alone among the Bourbaki group was familiar." Burp. Oops, sorry about that. I guess I ate too fast.

22. Johann Gottlieb Fichte johann Gottlieb Fichte. johann Gottlieb Fichte Born 19May-1762 It had beenarranged that he should return to Zürich and be married to johanna rahn, http://www.nndb.com/people/162/000093880/

This is a beta version of NNDB Search: All Names Living people Dead people Band Names Book Titles Movie Titles Full Text for Johann Gottlieb Fichte Born: 19-May-1762 Birthplace: Rammenau, Upper Lusatia, Saxony, Germany Died: 27-Jan-1814 Location of death: Berlin, Germany Cause of death: unspecified Gender: Male Ethnicity: White Sexual orientation: Straight Occupation: Philosopher Level of fame: Somewhat Executive summary: Critique of Revelation German philosopher, born at Rammenau in Upper Lusatia on the 19th of May 1762. His father, a ribbon-weaver, was a descendant of a Swedish soldier who (in the service of Gustav Adolph the Great ) was left wounded at Rammenau and settled there. The family was distinguished for piety, uprightness, and solidity of character. With these qualities Fichte himself combined a certain impetuosity and impatience probably derived from his mother, a woman of a somewhat querulous and jealous disposition. Settling at Leipzig, still without any fixed means of livelihood, he was again reduced to literary drudgery. In the midst of this work occurred the most important event of his life, his introduction to the philosophy of Immanuel Kant . At Schulpforta he had read with delight Gotthold Ephraim Lessing 's Anti-Goeze , and during his Jena days had studied the relation between philosophy and religion. The outcome of his speculations

23. GroomRA rahn, Frank J. 1916 Sep 15. Ericksen, Ella K. rahn, johann Carl Friedrich.1896 Oct 3. Petersen, Dorothea Paulina Nissen. rahn, johann Carl Friedrich http://www.qcmemory.org/Genealogy/MarrCert/GroomRA.htm

Index to Original Marriage Certificates pre-1836 to 1925, some to 1935 GROOMS RA Raabe, Heinrich 1895 Feb 2 Carstens, Alwine Raabe, Jochim 1891 Nov 25 Thielmann, Christina (Meyer) Raabe, Jochim 1891 Nov 25 Meyer, Christina Thielmann Raabe, Walter H. 1922 Aug 16 Dillig, Vera E. Raap, Frank 1896 Oct 28 Meckel, Anna Marie Raap, Nathaniel 1921 Nov 16 Dyer, June Raap, William 1907 Aug 21 Heuer, Emma Raap, William 1918 May 22 Paustian, Margaret Antionette Raasch, Charles 1896 Dec 12 Fick, Tillie Rabe, Christian Heinrich 1894 Mar 29 Myer, Gusta Rabe, Hans 1910 Feb 2 Woolheater, Helen Paulsen both 2d marr Rabe, Hans 1910 Feb 2 Paulsen, Helen (Woolheater) both 2d marr Rabe, Heinrich 1889 Aug 12 Schroeder, Mary both 2d marr Rabe, Henry 1885 Jan 27 Jensen, Sarah (Schmidt) Rabe, Henry 1885 Jan 27 Schmidt, Sarah Jensen Rabe, Henry 1909 Mar 31 Schaff, Hannah groom's 2d marr Rabe, William 1908 Feb 26 Kolln, Mary Raben, John 1910 Oct 16 Rohm, Sophia Rabenberg, Henry 1885 May 20 Steffen, Julia Raber, John 1905 Oct 25 Eckert, Rosie Rabinovetch, David 1914 Oct 18 Gelbond, Fannie Racster, John (Raester?)

24. The Science Bookstore - Chronology 1621 AD. Francois, Rene, Baron de Born 7/7/1622, 1622 AD. Viviani, VincenzoBorn 4/5/1622 Died 9/22/1703, 1622 AD. rahn, johann H. Born 3/10/1622 http://www.thesciencebookstore.com/chron.asp?searchstring=Math

25. Lunenburg Passenger Lists rahn, George Philip, 20, Isenbourg, Joiner. rahn, johann Laurence, 30, Isenbourg,Joiner. Rehn, Hendrick, 40, Palatinate, Farmer http://www.rootsweb.com/~canns/lunenburg/shiplist1.html

Passenger Lists for Ships Carrying the "Foreign Protestants" to Nova Scotia 100 Families of German Protestants 25 Jun 1751 "MURDOCH" Robert Hamilton, Master Name Age From Trade Alternate Spelling Albert, Jacob Wurtemberg Farmer Baergeld, Johannes Palatinate Farmer BORGAL Behn, Heinrich Palatinate Farmer Berger, Jacob Palatinate Joiner Biller, Johannes Hanault Farmer Brand, Jacob Palatinate Cooper BRUNT Clauter, Dirick Palatinate Farmer Commeus, Windelinus North Hoorn Surgeon Conrad, Johann Nicolas Heubach Farmer Conrad, Laurence Heubach Farmer Craner, Johann Peter Isenbourg Cooper Diell, Conrad Durlach Farmer DEAL Dittrich, Johann Casper Wurtemberg Farmer Ewald, Johann George Palatinate Farmer AWALT Fleck, Adam Erbach Farmer Frederick, Johann Erbach Farmer Gebhard, Bathazar Heubach Farmer Gebhard, Peter Heubach Farmer Glasser, Johann Fredk. Wurtemberg Cooper Godhart, Johann Christof Eyselben Tailor Gortter, Laurence Isenbourg Joiner Graeff, Conrad Palatinate Tailor Graul, Johann George Palatinate Gardener Green, John England N/A Greps, Hendrick Palatinate Farmer Greps, Philip Palatinate Farmer Haass, Bartholomew

26. Passenger Lists For Ships Carrying The Foreign Protestants To Translate this page Anthony 17 Wurtemberg Baker Pernette, Unknown 25 Alsace Officer rahn, GeorgePhilip 20 Isenbourg Joiner rahn, johann Laurence 30 Isenbourg Joiner Rehn, http://www.rootsweb.com/~canwgw/archives/ns/lunenburg/ships/shiplist1.txt

Passenger Lists for Ships Carrying the "Foreign Protestants" to Nova Scotia 100 Families of German Protestants 25 Jun 1751 "MURDOCH" Robert Hamilton, Master Name Age From Trade Alternate Spelling Albert, Jacob 30 Wurtemberg Farmer Baergeld, Johannes 31 Palatinate Farmer BORGAL Behn, Heinrich Palatinate Farmer Berger, Jacob 35 Palatinate Joiner Biller, Johannes 19 Hanault Farmer Brand, Jacob 25 Palatinate Cooper BRUNT Clauter, Dirick 20 Palatinate Farmer Commeus, Windelinus 41 North Hoorn Surgeon Conrad, J. Nicolas 18 Heubach Farmer Conrad, Laurence 46 Heubach Farmer Craner, Johann Peter 39 Isenbourg Cooper Diell, Conrad 30 Durlach Farmer DEAL Dittrich, Johann Casper 25 Wurtemberg Farmer Ewald, Johann George 24 Palatinate Farmer AWALT Fleck, Adam 33 Erbach Farmer Frederick, Johann 26 Erbach Farmer Gebhard, Bathazar 23 Heubach Farmer Gebhard, Peter 60 Heubach Farmer Glasser, Johann Fredk. 25 Wurtemberg Cooper Godhart, J. Christof 20 Eyselben Tailor Gortter, Laurence 40 Isenbourg Joiner Graeff, Conrad 24 Palatinate Tailor Graul, Johann George 34 Palatinate Gardener Green, John 42 England N/A Greps, Hendrick 16 Palatinate Farmer Greps, Philip 38 Palatinate Farmer Haass, Bartholomew 59 Heubach Farmer HAWES Haass, Johannes 18 Heubach Farmer HAWES Haass, Simon 20 Heubach Farmer HAWES Haertman, Catherine E. 34 Weilborn N/A Hartenbu, Johann Paul 36 Darmstad Saddler Hasse, Andries 19 Wurtemberg Joiner Haun, Johann George 46 Heubach Farmer Hautz, Johannes 30 Palatinate Farmer Heisson,Johann Fredk 42 Palatinate Farmer Hilst, Johann Daniel 21 Stolberg Baker HILTZ Hilst, Johann Heinrich 24 Stolberg Baker HILTZ Hinckell, Adolph 44 Darmstad Smith Hirshman, Ludowyk 36 Heubach Farmer Hortenbee, Johann Paul Darmstad Saddler Kensel, Jacob 23 Aschs Joiner Kneller, William 32 Palatinate Shoemaker Lanius, Philip 21 Isenbourg Cooper Lanius, Valentine 37 Isenbourg Weaver Lantz, Johann Heinrich 40 Frankfurt Farmer Leonhardt, J Adam 38 Palatinate Farmer Meisser, Peter 36 Stolberg Farmer Merkell, Michael 50 Durlach Farmer Mertz, Johann Heinrich 37 Weterau Glazier Metzelar, Johannes 19 Erbach Farmer METZLER Metzelar, Nicolas 50 Erbach Farmer METZLER Metzelar, Peter 21 Erbach Farmer METZLER Meysener, Casper 36 Stolberg Farmer Minich, Johann Heinrich 15 Palatinate Farmer Minich, Johann Philip 38 Palatinate Farmer Morash, J. Michael 23 Heubach Farmer Morash, Johannes 18 Heubach Farmer Muller, Adam 25 Hesse Farmer Nicolai, Christof Adam 19 Palatinate Surgeon Nicolai, J. Sebastian 56 Palatinate N/A Ostertag, Anthony 17 Wurtemberg Baker Pernette, Unknown 25 Alsace Officer Rahn, George Philip 20 Isenbourg Joiner Rahn, Johann Laurence 30 Isenbourg Joiner Rehn, Hendrick 40 Palatinate Farmer Rengelspach, Uswalt 46 Palatinate Farmer Retinger, Abraham 24 Palatinate Farmer Rissch, Michael 42 Wurtemberg Farmer Rodenhauser, Philip 40 Heubach Baker RHODENIZER Sawer, Johann Andreas 21 Heubach Farmer Sawer, Mathew 48 Heubach Farmer Schaffner, Adam 48 Palatinate Farmer Schinck, Johannes 38 Switzerland Gunpowder Maker Schmid, Christian 30 Palatinate Farmer Schmid, Jacob 24 Palatinate Farmer Schmid, Johannes 30 Darmstad Farmer Schnar, Ludowick 40 Heubach Farmer Schner, Michael 23 Heubach Farmer Schreek, Nicholas 36 Steinmark Farmer Schultz, Ferdinand 30 Palatinate Farmer Seilig, Johann Jacob 35 Palatinate Farmer Shloer, Jacob 30 Wurtemberg Smith Simon, Johannes 37 Erbach Cooper Spannagel, Philip 36 Palatinate Farmer SPONAGLE Viller, Ludowick 24 Palatinate Farmer Volcker, Erasmus 28 Stolberg Farmer Volcker, Nicholas 22 Stolberg Mason Volker, Andreas 37 Stolberg Joiner Vollmer, Andreas 47 Palatinate Baker FULMER Vonnerich, Johannes 35 Palatinate Smith Vorsner, Johannes Palatinate Smith Wagner, Philip 44 Hanault Farmer Walter, Andreas 28 Erbach Farmer Walter, Leonard 50 Erbach Farmer Wenzel, William 46 Darmstad Farmer Westhofer, Michael 33 Palatinate Farmer WESTHAVER Weuyest, J. Wendel 27 Darmstad Smith WUEST Winter, Johann Philip 25 Palatinate Farmer Wolff, Johannes 26 Durlach Farmer Wolff, Nicholas 29 Durlach Farmer Zinck, Johann Peter 14 Heubach Farmer Zink, Casper 41 Heubach Farmer

27. "Meyer" Bei ZVAB - Verzeichnis Antiquarischer Bücher (antiquarische Bücher Onl Translate this page johannes Meyer Frontispiz zu johann Heinrich rahn Eidtgenößische Geschicht-Beschreibung1690 17. Gründungsnotiz Collegium Insulanum 1679 18. http://www.zvab.com/angebote/meyer.html

Meyer Z ENTRALES V ERZEICHNIS A NTIQUARISCHER B Willkommen bei www.zvab.com Hier finden Sie Zur Homepage English Version Meyer ' an. Search our books database for it's current content on ' Meyer Meyer Meyer , Johann Jakob Sulzer, Felix Meyer und Johann Meyer I.: - Meyer Meyer Meyer : (Einzelblatt): Niemand veracht, dich selb betracht. (o.J.) IV: - Conrad Meyer Meyer , - Neujahrblatt der Burger-Bibliothek Winterthur 1668. VI.: - Meyer Meyer Meyer Details Kempe Michael und Thomas Maissen Scheuchzer: Meyer Meyer Meyer 1688 Neujahrsblatt Kunstkammer in der Wasserkirche 7. Johannes Meyer Meyer Meyer Neujahrsblatt 1680 Friedensallegorie 25. Conrad Meyer Meyer Neujahrsblatt 1683 Wohlstand der Eidgenossenschaft 27. Johannes Meyer Meyer Neujahrsblatt 1693 Parnassus Philosphicus 29. Johannes Meyer Meyer Neujahrsblatt 1700 Historia Die Wissenschaft der Historie 31. Johannes Meyer [SW: Physica Sacra Biblia Sacra Kupfer-Bibel Kupferbibel Scheuchzer Schevchzer Johann Jacob Rahn Wagner Escher Ott] Details Suchen und Finden Oder finden Sie das Buch, das Sie und Ihre Freunde so lange vergeblich suchten:

28. Articles: Signs For Sums The symbol for division, ÷, was first used by johann rahn in Teutsche Algebra in1659, though it may be that John Pell, who edited rahn’s book, could really http://www.worldwidewords.org/articles/signs.htm

Jump to content HOME PAGE SEND PAGE TO A FRIEND YOU ARE IN THE ARTICLES SECTION SECTION INDEX PREVIOUS PAGE NEXT PAGE OTHER SECTIONS REVIEWS TOPICAL WORDS TURNS OF PHRASE WEIRD WORDS FINDING THINGS INDEX (COMPLETE) SEARCH THE SITE SURPRISE ME! WEEKLY NEWSLETTER SUBSCRIBE BY E-MAIL SUBSCRIBE VIA RSS MANAGE SUBSCRIPTIONS GIFT SUBSCRIPTIONS ... BACK-ISSUES ARCHIVE SUPPORT PAGES ABOUT THE AUTHOR CONTACT THE AUTHOR OTHER WORDS SITES PRONUNCIATION GUIDE MY RECENT BOOKS ... POSH SIGNS FOR SUMS Where our arithmetic symbols come from An older method was to use a counting frame such as the abacus. There was a long-running controversy in medieval times about which was faster, the counting frame or pencil and paper, and competitions were held between the two systems to try to decide the matter. There were even names for the disputing groups, abacists and algorists . The second word is closely related to our modern algorithm For those who did calculations using symbols, it was common in medieval times to indicate plus and minus by the letters p and m Rechnung uff allen Kauffmanschafften et Whetstone of Witte The word whetstone coss , then used in English for the unknown thing in algebra (and hence the cossic art or the rule of coss for algebra). This word had come through French from the Italian

29. GODLIKE: Der Flieger: The First Of His Kind In 1923, rahn s father, johann rahn, a veteran of the war and later a NationalSocialist, was killed during the failed “Beer Hall Putsch” masterminded by http://www.arcdream.com/godlike/derflieger.shtml

Der Flieger: The First of His Kind "There can be no doubt now. The evil which has found a foothold in Nazi Germany has grown ripe, and spawned yet another monster." Winston Spencer Churchill, upon hearing the news of the Nazi "Super-man," 8 June 1936. Der Flieger Name: Konrad Rahn AKA Der Flieger Piorun Nationality: German. Political Affiliation: Nazi (National Socialist.) Education: Rank: (SS.) Honorary member of the Luftwaffe Decorations: Knight's Cross to the Iron Cross with Golden Oak Leaves, Swords and Diamonds. SS Honor Ring. SS Honor Sword. Pilot Badge in Gold with Diamonds. General Assault Badge. DOB: 6/1/16 Hamburg, Germany. DOD: 8/21/44 London, England (Killed by Anti-Aircraft Fire.) Known Parahuman Abilities: Rahn, the first known parahuman, could fly at speeds exceeding 800 miles per hour and was the first human to break the sound barrier. He was known to utilize his sonic boom to knock Allied aircraft out of the air with its devastating shockwave. Despite the torturous forces generated by flying at such speeds, Rahn suffered no ill effects; he could also fly at any altitude without suffering from lack of air or heat (though he could not achieve orbit, and rarely flew above 10,000 feet.)

30. Genealogy Data rahn, Janeen LeAnn Gender Female Family Schwanke, johann Birth 4 APR 1816Gender Male Parents. Father Schwanke, johann http://www.oelke.com/data/dat32.htm

Genealogy Data Back to Main Page Armstrong, Grace Birth : 8 SEP 1879 Death : 28 SEP 1919 Gender: Female Family: Marriage: living Spouse: Tagatz, Henrich Adolph Henry Gender: Male Parents: Father: Tagatz, Christopher John Mother: Schatzke, Louise Children: Tagatz, Lucille Dorothy Birth : living Gender: Female Tagatz, Genevieve Gender: Female Tagatz, Henry Jr Birth : living Gender: Male Tagatz, Ferdinand Christoph Birth : living Gender: Male Back to Main Page Wedell, William Gender: Male Family: Spouse: Tagatz, Lena P.E. Birth : 23 NOV 1887 Death : 5 SEP 1943 Gender: Female Parents: Father: Tagatz, Gustive Adolph Mother: Ristau, Bertha Back to Main Page Crawford, Ed Gender: Male Family: Spouse: Tagatz, Meta Alvine Birth : 23 NOV 1889 Death : APR 1956 Gender: Female Parents: Father: Tagatz, Gustive Adolph Mother: Ristau, Bertha Back to Main Page Friedrichs, Sidonia Adelaide Birth : 20 JUN 1901 Death : 1984 Gender: Female Parents: Father: Friedrichs, William Mother: Stuart, Sadie Family: Marriage: 13 JUN 1925 in Waukegan Il Spouse: Tagatz, Edwin Christian Martin

31. March 1 - Today In Science History The obelus was first used by johann rahn (16221676) in 1659 in Teutsche Algebra.rahn’s book was interpreted into English and published, with additions http://www.todayinsci.com/3/3_01.htm

Visit our new gallery of Perpetual Motion Machines through the centuries MARCH 1 - BIRTHS Seymour Papert (source) Born 1 Mar 1928 Computer scientist who invented the Logo computer programming language, an educational computer programming language for children. He studied under Piaget, absorbing his educational theories. He has studied ways to use mathematics to understand better how children learn and think, and about the ways in which computers can aid in a child's learning. With Marvin Minsky, he co-founded the Artificial Intelligence Lab at MIT. In the mid-80’s he worked in Costa Rica to develop a nationwide program of intensive computer use throughout the public education system. Costa Rica, which now has the highest literacy rate in the Americas, continues to serve as a model for large-scale deployment of computer technology in education. Archer Martin (source) Born 1 Mar 1910, died 28 Jul 2002. Archer J(ohn) P(orter) Martin was the British biochemist who was awarded (with R.L.M. Synge) the Nobel Prize for Chemistry in 1952 for development of paper partition chromatography using two different liquids moving at right angles. This quick and economical analytical technique separates the different components of a mixture, permitting their identification and analysis. As a new tool, it provided extensive advances in chemical, medical, and biological research. In 1941 Martin and Synge had realized that the partition of a solute between a gas and a liquid was possible, but it was in the early 1950s that Martin developed the technique of gas-liquid chromatography with A. T. James.

32. Names Of Mennonite Petitioners In 1868 johann Hofbesitzer 244 Orloff rahn, J. - Kaufmann 238 Neukirch Regehr, Joh.- Hofbesitzer 238 Neukirch Regehr, johann - Hofbesitzer 238 Neukirch http://users.foxvalley.net/~goertz/pet1868.html

Adalbert Goertz: (August 2004) Names of Mennonite Petitioners in 1868 Wohnort/residence Name-Stand / name-status Mennonitengemeinde Danzig 224 Neuenburg Janzen - Kaufmann Mennonitengemeinde Elbing Mennonitengemeinde Heubuden Mennonitengemeinde Ladekopp Mennonitengemeinde Lithauen - Pokraken Mennonitengemeinde Marcushof Mennonitengemeinde Montau-Gruppe Mennonitengemeinde Orlofferfelde Mennonitengemeinde Pordenau 217 Palschau Claasen, G. - Hofbesitzer 217 Palschau Dau, Peter - Hofbesitzer 246 Pordenau Dyck, Isaac - Hofbesitzer 217 Palschau Harder, Adolf - Hofbesitzer 246 Pordenau Harder, Jacob - Hofbesitzer 217 Palschau Nickel, Joh. - Kaufmann 217 Palschau Rogalsky, J. - Hofbesitzer 217 Palschau Wiebe, P. - Hofbesitzer 217 Palschau Wiens, J. - Hofbesitzer Mennonitengemeinde Quadendorf Mennonitengemeinde Rosenort Mennonitengemeinde Thiensdorf Mennonitengemeinde Tiegenhagen Mennonitengemeinde Tragheimerweide goertz@cyberspace.org

33. Immigrant Ancestor Postings Index, R - Palatines To America rahn, johann Georg St. Andrew 26 SEP 1737 Philadelphia,PA RAHRIG, John Peterunknown bef 1837 New York, NY? RAINMANN/REINMANN/REIMAN/RYMAN William P. http://palam.org/idx_r.htm

Palatines to America Immigrant Ancestor Postings Index, R Go to index for: [ A B C D ... Q R S T U V ... W ] [ X ] [ Y Z Date of Ancestor Ship Arrival Port RADLOFF, Ferdinand Allemania 4 MAY 1872 New Yorl, NY Mercury 29 MAY 1735 Philadelphia, PA RAENS, John Henry Mortonhouse 15 JUN 1728 Philadelphia, PA RAETZ, Gottlieb Carl MORAVIA 28 DEC 1891 New York, NY RAHM, Karl Max Rahm unknown 1887 New Orleans? RAHN, Johann Georg St. Andrew 26 SEP 1737 Philadelphia,PA RAHRIG, John Peter unknown bef 1837 New York, NY? RAINMANN/REINMANN/REIMAN/RYMAN William P. Johnson 3 DEC 1807 Philadelphia, PA RAKER/RIKER/REICHER, Matthias unknown 1825-1832? unknown, Carolinas? RAMBACH, Asemus Mary, PA 29 SEP 1733 Philadelphia, PA RAMLY, Hans Jurg

34. Earliest Uses Of Symbols Of Operation The asterisk (*) was used by johann rahn (16221676) in 1659 in Teutsche Algebra The obelus (÷) was first used as a division symbol by johann rahn (or http://members.aol.com/jeff570/operation.html

Earliest Uses of Symbols of Operation Last revision: Dec. 1, 2004 ADDITION AND SUBTRACTION SYMBOLS Plus (+) and minus (-). Nicole d' Oresme (1323-1382) may have used a figure which looks like a plus symbol as an abbreviation for the Latin et (meaning "and") in Algorismus proportionum, believed to have been written between 1356 and 1361. The symbol appears in a manuscript of this work believed to have been written in the fourteenth century, but perhaps by a copyist and not Oresme himself. The symbol appears, for example, in the sentence: "Primi numeri sesquiterti sunt .4. et .3., et primi numeri sev termini sesquialtere sunt .3. et .2." [Dic Sonneveld]. The plus symbol as an abbreviation for the Latin et , though appearing with the downward stroke not quite vertical, was found in a manuscript dated 1417 (Cajori). The + and - symbols first appeared in print in Mercantile Arithmetic or , by Johannes Widmann (born c. 1460), published in Leipzig in 1489. However, they referred not to addition or subtraction or to positive or negative numbers, but to surpluses and deficits in business problems (Cajori vol. 1, page 128). Here is an image of the first use in print of the + and - signs

35. Earliest Uses Of Symbols Of Set Theory And Logic symbol ( consisting of three dots )was first published in 1659 in the originalGerman edition of Teusche Algebra by johann rahn (16221676) (Cajori vol. http://members.aol.com/jeff570/set.html

Earliest Uses of Symbols of Set Theory and Logic Last updated: May 14, 2005 The study of logic goes back more than two thousand years and in that time many symbols and diagrams have been devised. Around 300 BC Aristotle introduced letters as term-variables, a "new and epoch-making device in logical technique." (W. & M. Kneale The Development of Logic (1962, p. 61). The modern era of mathematical notation in logic began with George Boole (1815-1864), although none of his notation survives. Set theory came into being in the late 19 th and early 20 th centuries, largely a creation of Georg Cantor (1845-1918). See MacTutor's A history of set theory or, for more detail, Set theory from the Stanford Encyclopedia of Philosophy Most of the basic symbols of logic and set theory in use today were introduced between 1880 and 1920. The main contributors were Ernst Schröder Giuseppe Peano Alfred North Whitehead (1861-1947) and Bertrand Russell (1872-1970). Peano had a strong influence on Whitehead and Russell and their joint work, Principia Mathematica (1910-1913), was itself very influential. Today

36. Upper Lester Cemetery, Douglas County, IL rahn, Hans b. Dec 2, 1830 d. May 30, 1907. rahn, johann P. - Gestorben _1884 - 1y 6m - sohn von johann und Maria rahn . rahn, Magretha - b. 1837 d. http://www.iltrails.org/douglas/uplestercem.html

Illinois Trails presents... Upper Lester Cemetery Garrett Township (partial listing) Please note: Some of these listings were contributed by researchers, but since the previous Douglas County host did not properly attribute the sources of her information, we are unable to determine which listings were contributed by whom. If you recognize information that you submitted, please email us so that we may assure that you get the proper credit you deserve for contributing and so that other researchers of that surname will be able to contact you! BUMGARDNER CARTER, Eurina - b. Sept 30, 1804 d. Jan 2, 1880 - wife of T. Carter CARTER, Thomas - b. Aug 1, 1805 d. June 14, 1895 COOK COOK CORDTS, CORDTS, Anna, Gattinvon H. Cordts - gest 8 Juni 1888 - alter 32 Jahre 3 mo u 14 T CORDTS, Henry - b. Oct 5, 1842 d. Sept 23, 1908 CRAWLEY, CRAWLEY, Rebecca A. - d. Apr 28, 1869 - 25y 6m 2d - wife of Thomas Crawley DEAL, DEAL, DILLON , William Ina - d. Apr 9, 1876 - 13y 2m 8d DRENNEN, William P. - d. Aug 19, 1854 - 39y 8d EPPLEY

37. Earliest Uses Of Symbols Of Operation And Grouping The asterisk (*) was used by johann rahn (16221676) in 1659 in TeutscheAlgebra (Cajori vol. 1, page 211). By juxtaposition. In a manuscript found buried http://www.veling.nl/anne/templars/operation.html

Earliest Uses of Symbols of Operation and Grouping Last revision: Aug. 15, 1997 ADDITION AND SUBTRACTION SYMBOLS Plus (+) and minus (-). The plus symbol as an abbreviation for the Latin et (and), though appearing with the downward stroke not quite vertical, was found in a manuscript dated 1417 (Cajori). The + and - symbols first appeared in print in Mercantile Arithmetic or Behende und hubsche Rechenung auff allen Kauffmanschafft , by Johannes Widmann (born c. 1460), published in Leipzig in 1489. However, they referred not to addition or subtraction or to positive or negative numbers, but to surpluses and deficits in business problems (Cajori vol. 1, page 128). Cajori says, "There is clear evidence that, as a lecturer at the University of Leipzig, Widmann had studied manuscripts in the Dresden library in which + and - signify operations, some of these having been written as early as 1486." Johnson (page 144) says a series of notes from 1481, annotated by Widmann, contain the + and - symbols, and he asks whether Widman could have copied these symbols from some unknown professor at the University of Leipzig. Johnson also says that a student's notes from one of Widmann's 1486 lectures show the + and - signs. Giel Vander Hoecke used + and - as symbols of operation in Een sonderlinghe boeck in dye edel conste Arithmetica

38. Henry Oldenburg FRS Henry Oldenburg FRS An Unpublished Letter From An unpublished letter from Henry Oldenburg to johann Heinrich rahn The Swissmathematician johann Heinrich rahn studied under John Pell in Zurich in the http://www.pubs.royalsoc.ac.uk/notes_content/abstracts/malcolm.html

Henry Oldenburg FRS An unpublished letter from Henry Oldenburg to Johann Heinrich Rahn by Noel Malcolm Notes and Records, September 2004 (vol. 58, no. 3, pp. 249-266) Full text available The Swiss mathematician Johann Heinrich Rahn studied under John Pell in Zurich in the 1650s. Prompted by Pell (who worked on a revised version of Rahn's treatise on algebra, which was published in London in 1668), Theodore Haak made contact with Rahn in 1671, and received a letter from him describing his recent work on optics. This letter was passed on to Henry Oldenburg, who, with the assistance of John Collins, composed a lengthy reply, surveying recent scientific and mathematical publications. Significantly, however, Oldenburg did not consult Pell, even though this correspondence arose in the first place from Pell's friendship with Rahn; the reason for this omission was that Oldenburg and Collins hoped that Rahn could supply details of Pell's mathematical methods that Pell himself was refusing to divulge. Oldenburg's letter is published here for the first time.

39. NGZ Neujahrsblatt 1947 rahn-Escher, David (1769-1848); rahn-vonOrelli, johann Heinrich (1749-1812); Rikli, Martin (1868 1946); Ritter, http://www.ngzh.ch/Neuj1947.html

von Als allgemeiner Teil der Festschrift zur 200-Jahr-Feier. Geschichte der Naturforschenden Gesellschaft von German only Inhalt: Einleitung Entwicklung Zeit und Ort der Sitzungen Mitgliederbestand Finanzen Organisation Beziehungen zu anderen Gesellschaften zu verschiedenen Gesellschaften zur S.N.G Unternehmungen Abgeschlossene Unternehmungen des ersten Jahrhunderts Volkswirtschaftlich-statistische Arbeiten Meteorologische, astronomische und Instrumentenkommission Die naturhistorischen Sammlungen Die botanische Kommission und der botanische Garten Die Bibliothek Laufende Unternehmungen verschiedener Art Naturschutz Vorstandsmitglieder Erinnerungen Zusammenfassung Register Home

40. Genealogy Family Group Sheets - Surnames - Ra rahn, Wilhelm johann married Auguste Wilhelmine Henriette Albertine K., 8children from 1851 to 1865 Rahring Rahring, Henry - born 1842, married johanna http://www.washcowis.com/grps0035.html

Washington County, Wisconsin Genealogy Family Group Sheets - Surnames - Ra Listed below are genealogy group sheets available for Washington County, Wisconsin and also for the neighboring counties of Milwaukee, Waukesha, Dodge, Fond du Lac, Sheboygan and Ozaukee counties . Here is a sample group sheet If you found this webpage from a search engine and would like more information on genealogy for this area of Wisconsin, see my home page at www.washcowis.com . This list was last updated on Aug 18, 2005. Raab Raab, Anton - born 1806, married Anna, 3 children from 1833 to 1844 Raab, Frederic - born 1835, married Sophie B., 8 children from 1868 to 1889 Raab, John - born 1870, married Louisa G., 6 children from 1900 to 1917 Raasch Raasch, Charles E. - born 1877, married Emma Josephine D., 4 children from 1901 to 1910 Raasch, Charles Johann - born 1841, married Bertha G., 5 children from 1876 to 1885 Raasch, Friedrich - married Rosaline B., 2 children from 1867 to 1874 Race Race, Frederick - born 1837, married Esther C., 7 children from 1869 to 1879 Rach Rach, Valentine - born 1873, married Margaret H., 3 children from 1904 to 1911

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