21. Math History - Middle Ages 1321, levi ben gerson (sometimes known as gersonides) writes Book of Numbers dealing 1343, levi ben gerson (gersonides) writes De harmonicis numeris http://lahabra.seniorhigh.net/pages/teachers/pages/math/timeline/MmiddleAges.htm

Math History Timeline Middle Ages 500 - 1400 A.D. Math History Prehistory and Ancient Times Middle Ages Renaissance Reformation ... 20th Century ... non-Math History Prehistory and Ancient Times Middle Ages Renaissance Reformation ... External Resources Varahamihira produces Pancasiddhantika (The Five Astronomical Canons). He makes important contributions to trigonometry. Decimal notation is used for numbers in India. This is the system on which our current notation is based. Brahmagupta writes Brahmasphutasiddanta (The Opening of the Universe), a work on astronomy; on mathematics. He uses zero and negative numbers, gives methods to solve quadratic equations, sum series, and compute square roots. About 700 Mathematicians in the Mayan civilization introduce a symbol for zero into their number system. About 810 Al-Khwarizmi writes important works on arithmetic, algebra, geography, and astronomy. In particular Hisab al-jabr w'al-muqabala (Calculation by Completion and Balancing)

22. LEVI BEN GERSON Translate this page levi ben gerson, auch gersonides oder Rabbi L. ben gerson (= RaLBaG), teils auchMeister Leo de Bagnols (= Magister Leo Hebraeus), jüdischer Philosoph, http://www.bautz.de/bbkl/l/Levi_b_g.shtml

Verlag Traugott Bautz www.bautz.de/bbkl Zur Hauptseite Bestellmöglichkeiten Abkürzungsverzeichnis ... NEU: Unser E-News Service Wir informieren Sie vierzehntägig über Neuigkeiten und Änderungen per E-Mail. Helfen Sie uns, das BBKL aktuell zu halten! Band IV (1992) Spalten 1572-1576 Autor: Bernd Kettern Werke: Sefer Milhamot Adonai, Riva di Trento 1560; erste Ausagbe in Dtld.: Die Kämpfe Gottes. Religionsphilos. und kosmische Fragen, Leipzig 1866 (1923 ); dt. Übersetzung: B. Kellermann, 2 Bde., Berlin 1914-1916; engl. Ausgabe: Norbert Max Samuelson, The problem of God's knowledge in Gersonides. An explanatory translation of book three of the Milhamot Ha-Shem, Cinncinnati 1962 (Toronto 1977); frz. Ausgabe: Charles Touati, Les guerres du seigneur (livres III et IV), Paris 1968; Perush al ha-Torah (Pentateuch-Kommentar), Mantua 1476, Venedig 1547; Perush al-Hiob. Commentarius in Job, Ferrara 1477, engl. Ausgabe: The Commentary of L. ben Gerson on the Book of Job, hrsg. von A. L. Lassen, New York 1946; weitere Pentateuch-Kommentare: Riva di Trento 1560, Königsberg 1860, Tel Aviv 1950; Sefer Maaseh Choscheb, Die Praxis des Rechners. Ein hebr.-arithmet. Werk des L. ben Gerschom aus dem Jahre 1321 (hebr./dt.), hrsg. von G. Lange, Frankfurt 1909; J. Halbronn bereitet eine Ausgabe der mathemat. Texte vor. Lit.:

23. Doron Zeilberger's 36th Opinion: Rabbi levi ben gerson, in his prealgebra text (1321), Sefer Ma asei Khosev, So levi ben gerson had an inkling of the algebraic revolution to come, http://www.math.rutgers.edu/~zeilberg/Opinion36.html

Opinion 36: Don't Ask: What Can The Computer do for ME?, But Rather: What CAN I do for the COMPUTER? By Doron Zeilberger Written: March 5, 1999 Rabbi Levi Ben Gerson, in his pre-algebra text (1321), Sefer Ma'asei Khosev, had about fifty theorems, complete with rigorous proofs. Nowadays, we no longer call them theorems, but rather (routine) algebraic identities. For example, proving (a+b)*c=a*c+b*c took him about half a page, while proving (a-b)*c+a*(b-c)=b*(a-c) took a page and a half, and proving a*(b*c*d)=d*(a*b*c) took him one page. The reason that it took him so long is that while he already had the algebraic concepts, he still was too hung-up on words, and while he used symbols, (denoted by dotted Hebrew letters), he did not quite utilize, systematically, the calculus of algebraic identities. The reason was that he was still in a pre-algebra frame of mind, and it was more than three hundred years later (even after Cardano), that probably Viete started the modern `high-school' algebra. So Levi Ben Gerson had an inkling of the algebraic revolution to come, but still did not go all the way, because we humans are creatures of habit, and he liked proving these deep theorems so much that it did not occur to him to streamline them, and hence kept repeating the same old arguments again and again in long-winded natural language.

24. Gersonides Rather, inasmuch as levi ben gerson is a member of the species humanity and the levi ben gerson s Contributions to Astronomy in Studies on gersonides. http://plato.stanford.edu/entries/gersonides/

version history HOW TO CITE THIS ENTRY Stanford Encyclopedia of Philosophy A ... Z This document uses XHTML/Unicode to format the display. If you think special symbols are not displaying correctly, see our guide Displaying Special Characters last substantive content change AUG The Encyclopedia Now Needs Your Support Please Read How You Can Help Keep the Encyclopedia Free Gersonides Perhaps no other medieval Jewish philosopher has been so maligned over the centuries as Gersonides (Levi ben Gerson, acronym Ralbag). Indeed, his major philosophical work, Sefer Milhamot Ha-Shem The War of the Lord , 1329), was called " Wars against the Lord " by one of his opponents. Despite the vilification of his position, Gersonides emerges as one of the most significant and comprehensive thinkers in the medieval Jewish tradition. He has been constantly quoted (even if only to be criticized), and, through the works of Hasdai Crecas and others, Gersonides' ideas have influenced such thinkers as Gottfried Wilhelm Leibiniz and Benedict de Spinoza. This article will survey his major contributions to medieval philosophy. 1. Introduction

25. MAA Student Paper Session I Spring 99 levi ben gerson is credited with inventing the Jacob Staff, I have constructeda Jacob Staff based upon levi ben gerson s method of construction. http://faculty.ssu.edu/~kmshanno/maa/student/session1.htm

MATHEMATICAL ASSOCIATION OF AMERICA Maryland-District of Columbia-Virginia Section MAA Student Chapters Conference Student Paper Session I 8:50 a.m. - 9:10a.m. Saturday April 10, 1999 Room: B31: Speaker: Devika Chawla, Georgetown University Title: The Secure Sockets Layer (SSL) Protocol Abstract: The talk will describe the key components of the SSL protocol. This protocol guarantees privacy by means of symmetric encryption of data, peer authentication using asymmetric cryptography, and connection reliability via message integrity checks. Speaker: Paul Dosart, James Madison University Title: Modeling Suspension Bridge Oscillations Using a Picard Iteration Technique . Abstract: A modified Picard iteration technique is used to solve equations involved with torsional oscillations in suspension bridges. Oscillations are modeled for different situations, and the different methods of solving these equations are discussed. The Picard iteration technique's accuracy is evaluated in comparison with other traditional methods. Room B34 Speaker: Melanie Hancock, St. Mary's College

26. Previous Volumes levi ben gerson s Preliminary Remarks for a Theory of Planetary Latitudes. 31.JL Mancha levi ben gerson s Star List for 1336. 59. Francisco MorenoCarvalho http://www.alephj.huji.ac.il/Previous.htm

The Hebrew University of Jerusalem Aleph 1 (2000) Aleph Abstracts ARTICLES B.R. Goldstein Levi ben Gerson's Preliminary Remarks for a Theory of Planetary Latitudes J.L. Mancha Levi ben Gerson's Star List for 1336 Francisco Moreno-Carvalho A Newly-Discovered Letter by Galileo Galilei . Contacts Between Galileo and Jacob Rosales (Manoel Bocarro Francês), a Seventeenth-Century Jewish Scientist and Sebastianist Hans Lausch "The Ignorant Hold Back Their Judgement and Await the Conclusions of the Knowing" — Moses Mendelssohn and Other Mathematicians David B Ruderman Some Jewish Responses to Smallpox Prevention in the Late Eighteenth and Early Nineteenth Centuries: A New Perspective on the Modernization of European Jewry David A. Hollinger

27. Philosophy: Philosophers: G: Gersonides Spirit And Sky levi ben gerson. levi ben gerson. Biographical article with links and bibliography,from the MacTutor History of Mathematics. http://www.spiritandsky.com/philosophy/philosophers/g/gersonides/

Home philosophy philosophers g : gersonides Web www.spiritandsky.com Home Search Suggest a Site Submission Guidelines ... g : gersonides Links: Bibliographia Gersonideana Bibliographia Gersonideana Annotated bibliography of primary and secondary sources on this medieval Jewish thinker, compiled by Menachem Kellner. (Added: Thu Jan 01 2004) ID 113673 Gersonides Gersonides Article by Tamar Rudovsky from the Stanford Encyclopedia of Philosophy. Provides a bibliography, in addition to discussions of this philosopher's life, work and doctrine of astrological determinism. (Added: Thu Jan 01 2004) ID 113671 Levi ben Gershon Levi ben Gershon Article on this medieval philosopher and astronomer, from the Jewish Encyclopedia. (Added: Thu Jan 01 2004) ID 113670 Levi ben Gerson Levi ben Gerson Biographical article with links and bibliography, from the MacTutor History of Mathematics. (Added: Thu Jan 01 2004) ID 113674 Wikipedia: Gersonides Wikipedia: Gersonides Article from this openly-edited encyclopedia. (Added: Thu Jan 01 2004) ID 113672 Home philosophy philosophers g : gersonides Home Search Suggest a Site Submission Guidelines ... About The Artist permission from spiritandsky.com is strictly prohibited.

28. Jewish Astronomy In Sefarad (Spain) 13 BR Goldstein (1985) The Astronomy of levi ben gerson (12881344), 14 BR Goldstein (1969) Preliminary Remarks on levi ben gerson s http://wise-obs.tau.ac.il/judaism/sefarad.html

Astronomy in Sefarad Yuval Ne'eman Mortimer and Raymond Sackler Institute of Advanced Studies Tel Aviv University , Israel 1. Greeks and Hebrews: two intertwining intellectual progressions In very broad lines, Western culture is the outcome of two independent intellectual progressions: Greek philosophy and science, centered on a rational understanding of the world - and Hebrew ethics, worrying about the condition of man and his interaction with other men. On the Greek side, we note that at the beginning of the first Century AD, Eratosthenes (250 BC) had already computed the diameter of the earth with an error of less than 1/2 %, Hipparchus (150 BC) had evaluated the distance to the Moon with a 1/3 % precision, Hero (100 BC) had invented the steam engine [1]. On the Jewish side, Abraham (1800 BC) had put an end to human sacrifice, Moses (1300 BC) had codified the day of rest, to be applied even to slaves and house animals, Amos (800 BC) had preached social justice and Isaiah (700 BC) had already conceived the idea of universal peace - in a world where war remained the explicit ideal "manly" activity for another thousand years [2]. Note that in this ethical voyage of discovery, Jewish society had evolved "schools" as early as 1000 BC [3], the earliest foundations of what was later to become a learning-oriented culture. In parallel, we have, of course, the Athens Academy ( ~ 500 BC). With the destruction of the Second Temple (70 AD), the Jewish cult and rites centre on learning much more than before. Judaism, as remodeled for a countryless nation by Yokhanan Ben Zakkay (Ist Century AD) became a study-oriented religion. Note that 1000 years later, in medieval Europe, all male Jews were literate, at a time when in most of Europe, only churchmen could read.

29. Aleph Table Of Contents No. 2 levi ben gerson s Preliminary Remarks for a Theory of Planetary Latitudes / 15 levi ben gerson s Star List for 1336 / 31. Francisco MorenoCarvalho http://iupjournals.org/aleph/aptoc2.html

Aleph Number 2 C ONTENTS Number 2 Abstracts / 9 Articles B.R. Goldstein Levi ben Gerson's Preliminary Remarks for a Theory of Planetary Latitudes / 15 J.L. Mancha Levi ben Gerson's Star List for 1336 / 31 Francisco Moreno-Carvalho Hans Lausch "The Ignorant Hold Back Their Judgement and Await the Conclusions of the Knowing"Moses Mendelssohn and Other Mathematicians / 93 David B. Ruderman Some Jewish Responses to Smallpox Prevention in the Late Eighteenth and Early Nineteenth Centuries: A New Perspective on the Modernization of European Jewry / 111 David A. Hollinger Why Are Jews Preeminent in Science and Scholarship? The Veblen Thesis Reconsidered / 145 Discussion Forum On Yehuda Liebes' recent Torat Ha-yesirah sel Sefer Yesirah Y. Tzvi Langermann On the Beginnings of Hebrew Scientific Literature and on Studying History Through " Maqbilot " (Parallels) / 169 David Shulman Sefer Yesirah and Sanskrit Linguistics / 191 Steve Wasserstrom Further Thoughts on the Origins of Sefer Yesirah Brief Communications A Newly-Discovered Partial Hebrew Version of Al-Khwarizmi's Algebra Ruth Glasner Levi ben Gershom (Gersonides) / 235 Cyrill Aslanov Joseph Ibn Kaspi / 259 John North Y. Tzvi Langermann

30. Ivars Peterson's MathLand combinations can be found in the writings of levi ben gerson (12881344). derived in a manner strikingly similar to that used by levi ben gerson. http://www.maa.org/mathland/mathland_1_20.html

Search MAA Online MAA Home Ivars Peterson's MathLand January 20, 1997 Fragments of the Past The early history of mathematics is like a jigsaw puzzle missing many of its pieces. Historians and mathematicians have been painstakingly filling in the blanks, gradually constructing a richer, more complete story of how and where mathematical thought originated and spread. One period of considerable interest is that between the decline of Greek mathematics, coinciding with the collapse of the western Roman Empire in the fifth century, and the rise of European mathematics in the fifteenth century. Mathematics professor Morris Kline of New York University's Courant Institute of Mathematical Sciences expressed a common view of that period in his 1972 book Mathematical Thought from Ancient to Modern Times . "The Arabs made no significant advance in mathematics," he wrote. "What they did was absorb Greek and Hindu mathematics, preserve it, and ultimately, ... transmit it to Europe." In other words, Islamic scholars did little more than put Greek mathematics into cold storage until Europe was ready to accept it.

31. Ivars Peterson's MathTrek -Square Of The Hypotenuse Around 1320, levi ben gerson (12881344) proved that if powers of 2 and 3 areconsecutive, they must be 8 and 9 (see Medieval Harmony, January 25, 1999). http://www.maa.org/mathland/mathtrek_12_4_00.html

Search MAA Online MAA Home Ivars Peterson's MathTrek December 4, 2000 Zeroing In on Catalan's Conjecture Fermat's last theorem is just one of many examples of innocent-looking problems that can long stymie even the most astute mathematicians. It took about 350 years to prove Fermat's scribbled conjecture, for instance. Now, Preda Mihailescu of the Swiss Federal Institute of Technology in Zurich has proved a theorem that is likely to lead to a solution of Catalan's conjecture, another venerable problem involving relationships among whole numbers. He presents his result in a paper to be published in the Journal of Number Theory. "This is a very important contribution," says mathematician Andrew Granville of the University of Georgia in Athens. Mihailescu's work probably puts the resolution of Catalan's conjecture into the foreseeable future, he notes. Named for Belgian mathematician Eugéne Charles Catalan, the conjecture concerns powers of whole numbers. For example, the sequence of all squares and cubes of whole numbers begins with the integers 4, 8, 9, 16, 25, 27, and 36. In this sequence, 8 (the cube of 2) and 9 (the square of 3) are not only powers but also consecutive whole numbers. In 1844, Catalan asserted that, among all powers of whole numbers, the only pair of consecutive numbers that arises is 8 and 9. His conjecture amounts to a search for whole-number solutions to the equation

32. Encyclopedia: Rabbinic Literature levi ben Gershon, (levi son of gerson), better known as gersonides or theRalbag (1288—1344 CE), was a famous rabbi, philosopher and Talmudic commentator, http://www.nationmaster.com/encyclopedia/Rabbinic-literature

Supporter Benefits Signup Login Sources ... Pies Related Articles People who viewed "Rabbinic literature" also viewed: Mefarshim Talmud Jewish law Rishonim ... Tanakh What's new? Our next offering Latest newsletter Student area Lesson plans Recent Updates Attack of the Show Atomic mass unit Astrological sign Association of Tennis Professionals ... More Recent Articles Top Graphs Richest Most Murderous Most Taxed Most Populous ... More Stats Encyclopedia: Rabbinic literature Updated 91 days 4 hours 49 minutes ago. Other descriptions of Rabbinic literature Rabbinic literature , in the broadest sense, can mean the entire spectrum of Judaism 's rabbinic writing/s throughout history. However, the term often used as an exact cognate of the Hebrew term Sifrut Hazal Talmudic era. The latter, more specific, sense is how the term is normally used in medieval and modern rabbinic writing (where Hazal normally refers only to the sages of the Talmudic era), and in contemporary academic writing (where "rabbinic literature" refers to Talmud, Midrash, and related writings, but hardly ever to later texts). The Star of David, a common symbol of Jews and Judaism Judaism is the religion and culture of the Jewish people and one of the first recorded monotheistic faiths. ...

33. Islamic Philosophy: Transmission Into Western Europe including Moses ibn Tibbon, Shem Tov Ibn Falaquera, levi ben gerson (see Republic) and of levi ben gerson s supercommentary on the Organon, http://www.muslimphilosophy.com/ip/rep/H056.htm

Islamic philosophy: transmission into Western Europe Early translations: twelfth century Thirteenth-century translations The contribution of Jewish scholars The beginnings of Arabic scholarship 1. Early translations: twelfth century Some seventy works were translated from Arabic by Gerard of Cremona , nicknamed 'the Master' ( dictus magister ), at the cathedral of Toledo. These included Aristotle's Posterior Analytics Physics On Generation and Corruption and Meteorology I-III (see Aristotle ), as well as four short tracts on natural science by Alexander of Aphrodisias . To these originally Greek works, Gerard added four philosophical letters of al-Kindi , a letter on proof by the Ikhwan al-Safa' and al-Farabi's Kitab ihsa' al-'ulum (On the Classification of the Sciences) (see al-Farabi Also at this time, the importance of the al-Shifa' (Healing) of Avicenna (Ibn Sina) was brought to the notice of Archbishop John of Toledo by a Jewish scholar called 'Avendauth' (perhaps the same as Abraham Ibn Daud , the author of al-'Aqida al-rafi'a (The Exalted Faith) ). Portions of the text, including those on universals, physics (in part), the soul and metaphysics, were translated by Avendauth, Dominicus Gundissalinus (an archdeacon in the cathedral

34. Western Philosophy And Religion characteristics of works of Moses Maimonides, Isaac Israeli, Judah Halevi,Abraham Ibn Daud, Hillel ben Samuel, levi ben gerson, many others. http://store.doverpublications.com/by-subject-philosophy-and-religion-western-ph

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35. A History Of Mediaeval Jewish Philosophy Judah Halevi, Abraham Ibn Daud, Hillel ben Samuel, levi ben gerson, JosephAlbo, and many others, the author offers insightful analyses and commentary. http://store.doverpublications.com/0486422372.html

American History, American...... American Indians Anthropology, Folklore, My...... Antiques Architecture Art Bridge and Other Card Game...... Business and Economics Chess Children Clip Art and Design on CD-...... Coloring Books Cookbooks, Nutrition Crafts Detective, Ghost , Superna...... Dover Patriot Shop Ethnic Interest Features Gift Certificates Gift Ideas History, Political Science...... Holidays Humor Languages and Linguistics Literature Magic, Legerdemain Military History, Weapons ...... Music Nature Performing Arts, Drama, Fi...... Philosophy and Religion Photography Posters Psychology, Education Puzzles, Amusement, Recrea...... Science and Mathematics Shakespeare Shop Sociology, Anthropology, M...... Sports, Out-of-Door Activi...... Stationery, Gift Sets Stationery, Seasonal Books...... Summer Fun Shop Summer Reading Shop Teacher's Store Travel and Adventure Women's Studies Clearance Center By Subject Philosophy and Religion Western Philosophy and Religion A History of Mediaeval Jewish Philosophy Isaac Husik Our Price (Table of Contents) Availability: In Stock Format: Book ISBN: Page Count: Dimensions: 5 3/8 x 8 1/2 In this enlightening study, a noted scholar elucidates the distinguishing characteristics of the works of several Jewish thinkers of the Middle Ages. In addition to summaries of the main arguments and teachings of Moses Maimonides, Isaac Israeli, Judah Halevi, Abraham Ibn Daud, Hillel ben Samuel, Levi ben Gerson, Joseph Albo, and many others, the author offers insightful analyses and commentary. Of particular value to beginners, this volume is also an ever-relevant resource for many issues of scholarly debate.

36. Lebensdaten Von Mathematikern Translate this page ben gerson, levi (1288 - 1344) Gherard von Cremona (1114 - 1187) levi, EugenioElia (1883 - 1917) levi ben gerson (1288 - 1344) http://www.mathe.tu-freiberg.de/~hebisch/cafe/lebensdaten.html

Diese Seite ist dem Andenken meines Vaters Otto Hebisch (1917 - 1998) gewidmet. By our fathers and their fathers in some old and distant town from places no one here remembers come the things we've handed down. Marc Cohn Dies ist eine Sammlung, die aus verschiedenen Quellen stammt, u. a. aus Jean Dieudonne, Geschichte der Mathematik, 1700 - 1900, VEB Deutscher Verlag der Wissenschaften, Berlin 1985. Helmut Gericke, Mathematik in Antike und Orient - Mathematik im Abendland, Fourier Verlag, Wiesbaden 1992. Otto Toeplitz, Die Entwicklung der Infinitesimalrechnung, Springer, Berlin 1949. MacTutor History of Mathematics archive A B C ... Z Abbe, Ernst (1840 - 1909) Abel, Niels Henrik (5.8.1802 - 6.4.1829) Abraham bar Hiyya (1070 - 1130) Abraham, Max (1875 - 1922) Abu Kamil, Shuja (um 850 - um 930) Abu'l-Wafa al'Buzjani (940 - 998) Ackermann, Wilhelm (1896 - 1962) Adams, John Couch (5.6.1819 - 21.1.1892) Adams, John Frank (5.11.1930 - 7.1.1989) Adelard von Bath (1075 - 1160) Adler, August (1863 - 1923) Adrain, Robert (1775 - 1843)

37. Gersonides -- Facts, Info, And Encyclopedia Article levi ben Gershon, ( levi son of gerson ), better known as gersonides or theRalbag (1288—1344 CE), was a famous (Spiritual leader of a Jewish congregation; http://www.absoluteastronomy.com/encyclopedia/g/ge/gersonides.htm

Gersonides [Categories: Medieval philosophers, Middle Ages rabbis, Philosophers of Judaism] Levi ben Gershon , ("Levi son of Gerson"), better known as Gersonides or the Ralbag (Spiritual leader of a Jewish congregation; qualified to expound and apply Jewish law) rabbi , philosopher and (The collection of ancient rabbinic writings on Jewish law and tradition (the Mishna and the Gemara) that constitute the basis of religious authority in Orthodox Judaism) Talmud ic commentator, and is well-known to scholars of (The monotheistic religion of the Jews having its spiritual and ethical principles embodied chiefly in the Torah and in the Talmud) Judaism . He was born at Bagnols in (Click link for more info and facts about Languedoc) Languedoc in what is today (A republic in western Europe; the largest country wholly in Europe) France Biography As in the case of the other (Click link for more info and facts about medieval) medieval Jewish (A specialist in philosophy) philosophers little is known of his life. His family had been distinguished for piety and exegetical skill in Talmud, but though he was known in the Jewish community by commentaries on certain books of the (The sacred writings of the Christian religions) Bible , he never seems to have accepted any rabbinical post. Possibly the freedom of his opinions may have put obstacles in the way of his preferment. He is known to have been at

38. Important Message From Doron Zeilberger So levi ben gerson had an inkling of the algebraic revolution to come, but stilldid not go all the way, because we humans are creatures of habit, http://pauillac.inria.fr/algo/AofA/mailing_list/msg00113.html

ANALYSIS of ALGORITHMS, Bulletin Board Date Prev Date Next Thread Prev Thread Next ... Thread Index Important message from Doron Zeilberger To AofA@pommard.inria.fr Subject Important message from Doron Zeilberger From helmut@cam.wits.ac.za Date: Wed, 7 Apr 1999 09:48:31 GMT +2 Organization: MS, University of the Witwatersrand Priority: normal http://www.math.temple.edu/~zeilberg/ http://www.math.temple.edu/~zeilberg/ http://www.math.temple.edu/~zeilberg/programs.html )., in particular RENE ( http://www.math.temple.edu/~zeilberg/tokhniot/RENE http://www.wits.ac.za/helmut/index.htm Prev by Date: complexite pseudo-diadique Next by Date: Set symmetric difference Prev by thread: complexite pseudo-diadique Next by thread: Set symmetric difference Index(es): Date Thread Date Prev Date Next ... Thread Index

39. Geomat levi ben gerson. af Ivan Tafteberg Jakobsen. Jakobsstaven er opfundet af denjødiske lærde levi ben gerson, også kendt under navnet gersonides eller Leo de http://www.geomat.dk/opdagelser_og_navigation/kildetekster/Levi_ben_Gerson/levi_

Vælg her ... Forsiden Undervisningsforløb Instrumenter Kildetekster Bibliotek og galleri Links Kontakt og bestilling Om geomat.dk geomat.dk Navigation Kildetekster : Levi ben Gerson (o.1340) Download i Wordformat Download i pdf-format Levi ben Gerson af Ivan Tafteberg Jakobsen Levi ben Gerson Herrens Krige , hvoraf Astronomien Levi ben Gersons Astronomi, oversat fra Bernard R. Goldstein: The Astronomy of Levi ben Gerson (1288-1344). A Critical Edition of Chapters 1-20 with Translation and commentary. Springer-Verlag, New York Inc. 1985. Kapitel 7 (p.55 ff): [se figur 7.1] [6] Vi opdeler staven i store enheder , og vi markerer dem i den plane overflades bredde fra den ene ende til den anden. [7] Enhederne skal tage deres begyndelse i synscentrets sted, som er omkring 1/20 af et fingerspand uden for staven. [se figur 7.2]

40. Den ældste Beskrivelse Af En Jakobsstav (o.1340) Download I Jakobsstaven er opfundet af den jødiske lærde levi ben gerson, levi ben gersonskrev på hebraisk et større religiøstfilosofisk værk med titlen Herrens http://www.geomat.dk/opdagelser_og_navigation/kildetekster/Levi_ben_Gerson/Levi_

(o.1340) Download i Wordformat Download i pdf-format (Ivan Tafteberg Jakobsen) Levi ben Gerson Herrens Krige , hvoraf Astronomien Levi ben Gersons Astronomi, oversat fra Bernard R. Goldstein: The Astronomy of Levi ben Gerson (1288-1344). A Critical Edition of Chapters 1-20 with Translation and commentary. Springer-Verlag, New York Inc. 1985. Kapitel 7 (p.55 ff): [se figur 7.1] [6] Vi opdeler staven i store enheder , og vi markerer dem i den plane overflades bredde fra den ene ende til den anden. [7] Enhederne skal tage deres begyndelse i synscentrets sted, som er omkring 1/20 af et fingerspand uden for staven. [se figur 7.2] [se figur 7.3] [se figur 7.3] [12] Alle disse diagonallinjer omfatter 1/12 af en enhed, hvilket er 5 minutter [se figur 7.4] [se figur 7.5] , for det er hvad vi vil kalde den. Noter: 1. Fingerspand (hebr. zeratot 2. Fingerbredde (hebr. 4. Ordet (hebr. ma'alot 6. Minut (hebr. daq 7. Sekund (hebr. sjenijim We then make many plates such that each one has a round hole in the middle of it; the staff should go through it with pressure, but we should be able to move the plate about it in any desired direction rundt + DC = AC

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