81. Wave Equation Solver http://frontier.ams.sunysb.edu/frontiercalc2/PDE_Solver/wavesolver/index_wavesol

82. Heat Equation Solver http://frontier.ams.sunysb.edu/frontiercalc2/PDE_Solver/heatsolver/index_heatsol

83. Quadratic   Equation   Calculator Calculator for solving a general quadratic equation. http://www.1728.com/quadratc.htm

Quadratic   Equation   Calculator Note: Do not enter commas. Input MUST have the format: AX + BX + C = EXAMPLE: If you have the equation: then enter:       2         4      -30 click E N T E R and your answers should be 3 and -5. A= B= C= X X If you need to have the answer in fractional form then: X= This calculator works by using the Quadratic Formula: If you need to find out how to determine the quadratic formula or if you want to know about "completing the square", then click here: Deriving The Quadratic Formula Significant Figures >>> Numbers are displayed in scientific notation in the amount of significant figures you specify. For easier readibility, numbers between 1,000 and -1,000 will not be in scientific notation but will still have the same precision. You may change the number of significant figures displayed by changing the number in the box above. Most browsers, will display the answers properly but if you are seeing no answers at all, enter a zero in the box above, which will eliminate all formatting but at least you will see the answers.

84. Diffpack Online Wave1Dfunc, 1D wave equation solver coded in F77/C style A time-dependent advection-equation solver equipped with adaptive grids and a tool for http://www.diffpack.com/book/appsuite_details.html

List of Jump Start Applications Jump Start Applications The Jump Start Applications is a collection of more than 50 source codes program templates for the purpose of quicly learning Diffpack programming. The complexity varies from simple "Hello World" programs to extensive coupled simulators for complicated multi-physics problems. They are constructed with a step-wise pedagogical exposition and are written by the most experienced Diffpack programmers. You may download these applications from our Download Area Descriptions of Jump Start Applications AdvecA Time-dependent advection-equation with adaptive grids arraysyntax Demonstration of vectors and matrices in Diffpack Cd Nonlinear time-dependent PDEs of convection-diffusion type Variant of Poisson1 tailored to a complex PDE Simulator for a complex PDE Finite element convection-diffusion simulator 2D heat or diffusion equation on a rectangle Thermo-elastic problems with a prescribed temperature field 2D/3D simulator for elasto-plastic problems ExpBasisFunc Example on how to implement new finite elements in Diffpack GaussSeidelDemo Gauss-Seidel for finite difference-discretized Poisson equation Time-dep. heat and diffusion equation, extension Poisson1

85. SUNDIALS CVODE is a solver for systems of ordinary differential equations (ODEs). User Documentation for IDA, a DifferentialAlgebraic equation Solver for http://acts.nersc.gov/sundials/

Introduction Users Evaluation Status ... Developers Applications ParFlow ParFlow SUNDIALS Introduction SUNDIALS (SUite of Nonlinear and DIfferential/ALgebraic equation Solvers) refers to a family of closely related solvers: CVODE , for systems of ordinary differential equations, CVODES , variant of CVODE for sensitivity analysis, KINSOL , for systems of nonlinear algebraic equations, and IDA , for systems of differential-algebraic equations. These solvers have some code modules in common, primarily a module of vector kernels and generic linear system solvers, including one based on a Scaled Preconditioned GMRES method. All of the solvers are suitable for either serial or parallel environments. Parallelization was accomplished by rewriting the module of vector kernels, whereby the parallel version of each kernel operates on vectors that have been distributed across processors. All message passing calls are made through MPI. CVODE is a solver for systems of ordinary differential equations (ODEs). It contains methods for the solution of both stiff and nonstiff initial value problems. Integration methods include variable-coefficient forms of the Adams-Moulton and Backward Differentiation Formula methods. In the case of stiff problems, the linear systems can be solved by direct (dense or band) methods (in serial environments only), or by a preconditioned Krylov method, GMRES. In the direct cases, the user can supply the system Jacobian or let the solver generate it internally. In the case of GMRES, the user can either supply a preconditioner or use one that is included with the package. The latter is a block-banded preconditioner based on domain decomposition. CVODE is written in C but is usable in a Fortran application, by way of a package of interface routines included.

86. Study Trigonometry With College-Cram.com! Mastering trigonometry can be easier with our Formula solvers and other Cramlets™. Use this Formula Solver! Series program to learn how to calculate the http://www.college-cram.com/library/study-trigonometry.htm

user Name: password: home free registration FAQ contact ... blog Accounting Astronomy Biology Business-Math Chemistry College-Algebra Economics Finance French Fun German Mythology Physics Pre-Calculus Spanish Trigonometry All Angle Functions Complex Numbers Trigonometry Angle Functions Area of a Triangle Using Sine: How do you figure out the area of a triangle if you only know two sides and the angle between them? This formula solver will show you! area of a trianglestwo sidesanglesine Cosecant of an Angle: Use this Formula Solver! Series program to learn how to calculate the cosecant of an angle. It's great for checking your homework answers, too! right trianglehypotenusehypotenuseoppositesine Cosine of an Angle: Review how the basic concept of the cosine function works, using this Formula Solver! Series program. Use it to check your homework answers too! adjacentright trianglehypotenusearccosineinversedrexel Cosine/ArcCosine of an Angle: Explore how to use cosine and arccosine in a triangle using this Formula Solver! Series program. Use it to check your homework answers too! adjacentright trianglehypotenusearccosineinverseCosine/ ArcCosine of an Angle Cotangent of an Angle: Use this Formula Solver! Series program to learn how to calculate the cotangent of an angle. It's great for checking your homework answers, too!

87. ASPN : Python Cookbook : A Simple Equation Solver Using Attribute Access And Int ActiveState Open Source Programming tools for Perl Python XML xslt scripting with free trials. Quality development tools for programmers systems http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/303396

sign in join Cookbooks Documentation ... All Cookbooks View by Category Algorithms CGI Databases and ... Debugging and Testing ... XML Programming Title: A simple equation solver using attribute access and introspection Submitter: David Klaffenbach ( other recipes Last Updated: Version no: Category: Rate 5 - Excellent 4 - Very good 3 - Good 2 - Needs work 1 - Poor Not Rated yet Description: This is a little equation solver somewhat modelled on the solvers available in some scientific calculators. You pass it a function which returns zero when the desired relation is true. Once you create a solver object, you can solve for any variable. Source: Text Source '''equation solver using attributes and introspection''' from future import division class Solver (object): '''takes a function, named arg value (opt.) and returns a Solver object''' def # see important note on order of operations in setattr below. for arg in f.func_code.co_varnames[0:f.func_code.co_argcount]: self._args[arg]=None self._setargs(**args) def repr(self): argstring= .join([ '%s=%s' % (arg,str(value))

88. A Flexible Technique For Time Integration Of Chemical Differential Equations method based on a fast general differential equation solver and a preprocessor The solver chosen is a linearlyimplicit 2-stage Rosenbrock method http://www.mpch-mainz.mpg.de/~kuhlmann/rvkdisshtml/node21.html

Next: Dry Deposition Up: Chemical Module in MATCH-MPIC Previous: Photolysis Rates Contents A flexible technique for time integration of chemical differential equations Integrating the chemical equations forward in time involves the solution of a set of stiff differential equations. In 3D chemical modeling mainly two techniques are applied, the Quasi-Steady-State-Approximation (QSSA, Hesstvedt et al. ) and the Euler Backward Iterative (EBI, Hertel et al. ) method (see e.g. Kanakidou et al. for an overview), or a parameterization of the chemistry is used ( Levy et al. Wang et al. ). However, all of these methods are heavily dependent on the problem to be solved. Although they have been proven to be fast enough for 3D applications (one of the strongest constraints on a numerical method in this field, especially as chemical schemes are becoming more and more complex), their implementation requires much error-prone manual coding and considerable experience. For good performance and stability, they need manual lumping of species into strongly interacting groups. Also, the methods are not generally mass conserving. Since a goal of this thesis was to use different chemical schemes (see Chapter ), a general solving method, which allows flexible changing of the chemical mechanism, is clearly advantageous. Therefore it was decided to use a new method based on a fast general differential equation solver and a preprocessor that provides the basic mathematical routines needed. The solver chosen is a linearly-implicit 2-stage Rosenbrock method called

89. ESTS0752: VCODE, Ordinary Differential Equation Solver For Stiff And Non-Stiff P ESTS0752 CVODE. (Abstract last modified 21MAR-2001). VCODE, Ordinary Differential equation Solver for Stiff and Non-Stiff Problems http://www.nea.fr/abs/html/ests0752.html

Nuclear Safety Radioactive Waste Radiation Protection Nuclear Development ... Recent programs ESTS0752 CVODE. (Abstract last modified 21-MAR-2001) VCODE, Ordinary Differential Equation Solver for Stiff and Non-Stiff Problems Abstract Table of Contents: NAME COMPUTER PROBLEM SOLUTION ... CATEGORIES 1. NAME OR DESIGNATION OF PROGRAM - CVODE (Stiff/Nonstiff Ordinary Differential Eqn Solver in C, Direct and Iterative Method). 2. COMPUTER FOR WHICH PROGRAM IS DESIGNED AND OTHER MACHINE VERSION PACKAGES AVAILABLE - To request or retrieve programs click on the one of the active versions below. A password and special authorization is required. Explanation of the status codes. Program-name Package-ID Status CVODE ESTS0752/01 Arrived Machines used: Package-ID Orig.Computer Test Computer ESTS0752/01 SUN 3. DESCRIPTION OF PROGRAM OR FUNCTION - CVODE is a package written in ANSI standard C for solving initial value problems for ordinary differential equations. It solves both stiff and non stiff systems. In the stiff case, it includes a variety of options for treating the Jacobian of the system, including dense and band matrix solvers, and a preconditioned Krylov (iterative) solver. 4. METHOD OF SOLUTION - Integration is by Adams or BDF (Backward Differentiation Formula) methods, at user option. Corrector iteration is by functional iteration or Newton iteration. For the solution of linear systems within Newton iteration, users can select a dense solver, a band solver, a diagonal approximation, or a preconditioned Generalized Minimal Residual (GMRES) solver. In the dense and band cases, the user can supply a Jacobian approximation or let CVODE generate it internally. In the GMRES case, the preconditioner is user-supplied.

90. Institute For Computational Dynamics Direct Gaussian equation Solver for the Mixed Finite Element Formulation of Tree Multigrid Generator and Iterative equation Solver for Mixed Finite http://www.iu.hio.no/~sowille/public/journal_txt.html

International Scientific Journals A Priori Pivoting Scheemes for a Sparse Direct Gaussian Equation Solver for the Mixed Finite Element Formulation of the Navier - Stokes Equations. Applied Mathematical Modelling. 28, 7, 607-616. 2004. A Priori Pivoting and Segregation of Variables for Iterative Solution of the Mixed Finite Element Formulation of the Navier - Stokes Equations. International Journal for Numerical Methods in Fluids. 47, 977-996, 2003. A Priori Pivoting in Solving the Navier - Stokes Equations. Communications in Numererical Methods in Engineering. 18, 691-698, 2002. A Priori Pivoting in Incomplete Gaussian Preconditioning for Iterative Solution of Mixed Finite Element Formulation of the Navier-Stokes Equations. Computer Methods in Applied Mechanics and Engineering. 190/29-30, 3735-3747, 2001

91. RECSY - High Performance Sylvester-Type Equation Solver Library Library by Isak Jonsson and Bo Kågström for solving triangular Sylvestertype matrix equations. http://www.cs.umu.se/research/parallel/recsy/

RECSY — High Performance Library for Sylvester-Type Matrix Equations Isak Jonsson and Bo Kågström Contents Introduction Sylvester-Type Matrix Equations Triangular Matrix Equations Usage ... References Introduction RECSY is a library for solving triangular Sylvester-type matrix equations. Its objectives are both speed and reliability. In order to achieve these goals, RECSY is based on novel recursive blocked algorithms , which call new high-performance kernels for solving small-sized leaf problems of the recursion tree [ Jonsson and Kågström , 2002a, 2002b]. In contrast to explicit standard blocking techniques, our recursive approach leads to an automatic variable blocking that has the potential of matching the memory hierarchies of today’s HPC systems. The RECSY library comprises a set of Fortran 90 files, which uses recursion and OpenMP for shared memory parallelism to solve eight different matrix equations, including continuous-time as well as discrete-time standard and generalized Sylvester and Lyapunov equations. Sylvester-Type Matrix Equations The Sylvester-type matrix equations considered are a set of linear matrix equations that appear and are commonly used in different control theory applications.

92. Transvalor, Simulation Software For Material Forming Processes. a flow front transport equation solver, and a heat equation solver. REM3D® features two standard behavior laws used in the modelling of injection molding http://www.transvalor.com/index.php?rub=37&mo=5&so=37

93. Man Scilab dasrt DAE solver with zero crossing dassl - differential algebraic equation ode_root - ordinary differential equation solver with root finding http://scilabsoft.inria.fr/product/man/html/eng/nonlinear/whatis.htm

Man Scilab NDcost - generic external for optim computing gradient using finite differences bvode - boundary value problems for ODE dasrt - DAE solver with zero crossing dassl - differential algebraic equation datafit - Parameter identification based on measured data derivative - approximate derivatives of a function - Parameter identification based on measured data fsolve - find a zero of a system of n nonlinear functions impl - differential algebraic equation - definite 2D integral by quadrature and cubature method - definite 3D integral by quadrature and cubature method intc - Cauchy integral intg - definite integral intl - Cauchy integral karmarkar - karmarkar algorithm leastsq - Solves non-linear least squaresproblems linpro - linear programming solver lmisolver - linear matrix inequation solver lmitool - tool for solving linear matrix inequations lsqrsolve - minimize the sum of the squares ofnonlinear functions, levenberg-marquardt algorithm numdiff - numerical gradient estimation ode - ordinary differential equation solver - ordinary differential equation solver, discrete time simulation

94. Ode: ----- Ordinary Differential Equation Solver 2.5.20 ode ordinary differential equation solver. CALLING SEQUENCE. y=ode(y0,t0,t,f) y,w,iw=ode(type,y0,t0,t ,rtol ,atol,f ,jac ,w,iw) y http://scilabsoft.inria.fr/doc/manual/Docu-html678.html

2.5.20 ode: - ordinary differential equation solver CALLING SEQUENCE y=ode(y0,t0,t,f) [y,w,iw]=ode([type],y0,t0,t [,rtol [,atol]],f [,jac] [,w,iw]) [y,rd,w,iw]=ode("root",y0,t0,t [,rtol [,atol]],f [,jac],ng,g [,w,iw]) y=ode("discrete",y0,k0,kvect,f) PARAMETERS : real vector or matrix (initial conditions). : real scalar (initial time). t : real vector (times at which the solution is computed). f : external (function or character string or list). type : one of the following character string: "adams" "stiff" "rk" "rkf" "fix" "discrete" "roots" rtol,atol : real constants or real vectors of the same size as y jac : external (function or character string or list). w,iw : real vectors. ng : integer. g : external (function or character string or list). : integer (initial time). kvect : integer vector. DESCRIPTION ode is the standard function for solving explicit ODE systems defined by: dy/dt=f(t,y) , y(t0)=y0. It is an interface to various solvers, in particular to ODEPACK. The type of problem solved and the method used depend on the value of the first optional argument type which can be one of the following strings: not given lsoda solver of package ODEPACK is called by default. It automatically selects between nonstiff predictor-corrector Adams method and stiff Backward Differentiation Formula (BDF) method. It uses nonstiff method initially and dynamically monitors data in order to decide which method to use.

95. ChiefDelphi Forums - Complex Equation Solver This is a discussion forum used to discuss the FIRST Robotics Competition. http://www.chiefdelphi.com/forums/archive/index.php/t-27866.html

ChiefDelphi Forums Other Math and Science PDA View Full Version : Complex Equation Solver 04-18-2004, 04:37 PM Hi everyone ! :) Lately in this Statics class I have been running into problems with complex equations. For example, today I have to solve this 2 equations and 2 unknows: (The unknowns are N and x; Note that itan = arctan = tan^-1) (1) 0.4N - 75cos(itan(12/x)) = (2) N - 180 + 75sin(itan(12/x)) = They seem not "that" hard but they are if I try to solve them by hand :p I was wondering if anyone could give me the answer to N and x for those equatios, and also if anyone knows any software that would solve those kind of equations I would really appreciate it if you can give me the name, website, anything :) Thank you very much. Have a good one, D.T. Yan Wang 04-18-2004, 06:19 PM The TI89 or HP49G+ calculators have multivariable equation solvers built in. But I don't feel like pulling mine out. As for software, my copy of Mathematica can easily do it. Along with most anything else I need related to math or physics. mtrawls 04-18-2004, 06:21 PM

96. OR/MS Today - August 1997 - Software Review Over the years, TK Solver has evolved from a basic equation solver to a versatile mathematical At the heart of the TK system is the equation solver. http://www.lionhrtpub.com/orms/orms-8-97/SoftwareReview.html

OR/MS Today, August 1997 Software Review: TK Solver Release 3.0 Mathematical modeling package is versatile, offers application development capabilities By Jerry Allison TK Solver from Universal Technical Systems, Inc. (UTS) has been around since the early 1980s. Over the years, TK Solver has evolved from a basic equation solver to a versatile mathematical modeling and application development tool. It has proven to be popular, especially among engineers and physical scientists. Release 3 for Windows has added several features that should make it even more so. These features include OLE Automation support for custom front-end programming using Visual Basic, Microsoft Excel or other environments; OLE 2.0 support for dynamic linking and embedding of TK objects into Microsoft Office documents; external function calls using FORTRAN, C, Pascal and other compiled languages; a set of Wizards to aid in list solving, plotting and unit conversion; and a Greek character palette for math equations. Word has been received from UTS that it is currently beta testing a 32-bit version of TK Solver for Windows 95/NT. This review, however, covers the Windows 3.x version.

97. Differential Equations - Mathematics And Engineering Software - Maplesoft Maplesoft is a world leader in mathematical and analytical software. The Maple system embodies advanced technology such as symbolic computation, http://www.maplesoft.com/products/maple/features/solid/de.aspx

Maple MapleNet Maple T.A. Toolboxes ... Contact Maple 10 Product Details Maple 10 for Professionals Maple 10 Student Edition Explore Maple 10 Maple 10 Home Maple 10 Online Training Courses New Features in Maple 10 Maple 10 Featured Applications ... Testimonials How to Proceed Purchase and Download Immediately Upgrade From a Prior Version of Maple Request a Quote Contact Sales Stay Informed Subscribe to the Maple Reporter Become a Maplesoft Member Home All Products ... New Features in Maple 10 : Differential Equations Differential Equations The following is a list of some of the improvements for finding exact solutions of ODEs and partial differential equations (PDEs), and systems of ODEs and PDEs. Newly developed solving algorithms for certain classes of Abel type ODEs, Riccati type ODEs, and Heun function solutions Newly developed solving algorithms for computing different types of Traveling Wave Solutions for PDEs and PDE systems Newly added algorithms for computing Liouvillian solutions and for solving a general class of ODEs that can be mapped to Abel type

98. Http://vizimag.homestead.com - Cos And Find Relapse Is Experts Connector Was 2. If you haven t noticed, this World Wide Web page is under construction. Some MAJOR changes coming VERY SOON! Please back later. http://vizimag.homestead.com/

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