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Numeric equation solving, calculus and statistics, precision and accuracy control for numeric computations...

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NDSolve error: Encountered non-numerical value

QUESTION FROM: Yumin Tian | 1 day ago BY: Gianluca Gorni
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
8
REPLIES
81
VIEWS

Symbolic integration gives wrong result. Is this a bug?

QUESTION FROM: Ralph Trenkler | 15 days ago BY: Michael Rogers
Calculus , Mathematics , Numerical Computation , ...
1
REPLIES
198
VIEWS

Variable arguments to functions

QUESTION FROM: Iuval Clejan | 8 hours ago BY: Iuval Clejan
Optimization , Mathematics , Numerical Computation , Wolfram Language
29
REPLIES
275
VIEWS

Looking for help cleaning up a Mathematica notebook into a reference implementation

QUESTION FROM: Merlin Stampa | 2 months ago BY: Eric Rimbey
Control Systems , Equation Solving , Jobs & More Exchange , ...
3
REPLIES
371
VIEWS

Can one use WhenEvent to react to NDSolve failures?

QUESTION FROM: Leslaw Bieniasz | 3 months ago BY: Michael Rogers
Calculus , Equation Solving , Numerical Computation , Wolfram Language
1
REPLIES
355
VIEWS

Constrained optimization with changing constraints based on value of target function

QUESTION FROM: Iuval Clejan | 3 months ago BY: Iuval Clejan
Optimization , Numerical Computation
3
REPLIES
361
VIEWS

Is the a precision loss due to export/import of numerical values?

QUESTION FROM: Leslaw Bieniasz | 3 months ago BY: Michael Rogers
Algebra , Calculus , Equation Solving , Numerical Computation
4
REPLIES
471
VIEWS

Residue curves for a reactive ternary system

QUESTION FROM: Housam Binous | 4 months ago
Calculus , Chemistry , Engineering , Graphics and Visualization , ...
0
REPLIES
372
VIEWS

Are there packages for page-wise Eigensystem?

QUESTION FROM: Hertz Tsi | 4 months ago
Algebra , Data Science , High-Performance Computing , Mathematics , ...
0
REPLIES
413
VIEWS

Is there any way to modify the integration domain in course of NDSolve operation?

QUESTION FROM: Leslaw Bieniasz | 4 months ago
Calculus , Equation Solving , Numerical Computation
0
REPLIES
455
VIEWS

How to crunch numbers in Mathematica. How to properly use it to test if a given method solves faster

QUESTION FROM: Bobby Joe Snyder | 5 months ago BY: Mark Harder
Data Science , Graphics and Visualization , Mathematica , ...
4
REPLIES
1.4K
VIEWS

Numerical test for divergence/convergence of integrals on (0, $\infty$)

QUESTION FROM: Denis Ivanov | 6 months ago BY: Gianluca Gorni
Calculus , Mathematics , Numerical Computation , ...
1
REPLIES
1K
VIEWS

Explain SetPrecision and N

QUESTION FROM: Ulrich Utiger | 6 months ago BY: Ulrich Utiger
Graphics and Visualization , High-Performance Computing , ...
5
REPLIES
1.2K
VIEWS

Why does my Mathematica program use 100% CPU but very little RAM and still not finish after hours?

QUESTION FROM: Reza rho | 6 months ago BY: Reza rho
Calculus , Graphics and Visualization , Mathematics , ...
4
REPLIES
1.1K
VIEWS

Computing integral errors: Mathematica vs Matlab Simulink

QUESTION FROM: Housam Binous | 7 months ago
Chemistry , Control Systems , Engineering , ...
0
REPLIES
865
VIEWS

Anticommuting spinor calculations

QUESTION FROM: Todd Rowland | 7 months ago BY: Mohammad Bahrami
Algebra , Mathematics , Numerical Computation , Physics , ...
1
REPLIES
1.5K
VIEWS

Best optimization for maximum entropy?

QUESTION FROM: Gareth Russell | 7 months ago BY: Gareth Russell
Optimization , Mathematics , Numerical Computation , ...
6
REPLIES
1.4K
VIEWS

What's missing in connection between the prime number theorem and the MRB constant?

QUESTION FROM: Marvin Ray Burns A.G.S. (cum laude) | 8 months ago
Graphics and Visualization , Mathematics , Numerical Computation , ...
0
REPLIES
2K
VIEWS

What is wrong with WhenEvent ?

QUESTION FROM: Mikhail Khenner | 9 months ago BY: Mikhail Khenner
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
3
REPLIES
1.6K
VIEWS

Modeling airflow past a car

QUESTION FROM: David Keith | 6 months ago BY: Jeff Lastofka
Equation Solving , Graphics and Visualization , Modeling , ...
16
REPLIES
3.3K
VIEWS

How to numerically solve a master equation for a time-dependent 3-qubit density matrix in Mathematic

QUESTION FROM: Reza rho | 9 months ago BY: David Trimas
Algebra , Equation Solving , Mathematics , Numerical Computation , ...
4
REPLIES
1.8K
VIEWS

Using NIntegrate with nested integrals

QUESTION FROM: Max Shpak | 9 months ago BY: Max Shpak
Calculus , Mathematics , Numerical Computation , Wolfram Language
6
REPLIES
1.7K
VIEWS

Getting the Jacobian with FindRoot output

QUESTION FROM: Housam Binous | 10 months ago BY: Daniel Lichtblau
Mathematics , Numerical Computation , Wolfram Language
3
REPLIES
1.6K
VIEWS

Elliptic integrals: built-in vs. explicit integration

QUESTION FROM: Davide Gardini | 10 months ago BY: Gianluca Gorni
Calculus , Mathematics , Numerical Computation , Wolfram Language
5
REPLIES
1.3K
VIEWS

Overflow calculating the last 10, 000 digits of (((96717311574016^16777216^4)^8^4)^7)^2

QUESTION FROM: Mark Raygorodsky | 10 months ago BY: Mark Raygorodsky
Computer Science , Mathematics , Numerical Computation , ...
23
REPLIES
3.1K
VIEWS

Errors in solving a complex equation: FindRoot and NIntegrate cannot converge

QUESTION FROM: S. Gallagher | 11 months ago
Equation Solving , Mathematics , Numerical Computation , ...
0
REPLIES
1.5K
VIEWS

Debugging fitting data and empty plot

QUESTION FROM: Sahrawi Chaib | 11 months ago BY: Michael Rogers
Data Science , Graphics and Visualization , Optimization , ...
4
REPLIES
1.4K
VIEWS

How to speed up numerical calculations of the inverse method in game theory？

QUESTION FROM: yanshao Wang | 11 months ago BY: yanshao Wang
Optimization , Mathematics , Numerical Computation , ...
1
REPLIES
1.5K
VIEWS

Generating natural structures with Wolfram

QUESTION FROM: Denis Ivanov | 11 months ago BY: Denis Ivanov
Biological Sciences , Equation Solving , Mathematics , Modeling , ...
2
REPLIES
2K
VIEWS

PI Controller Tuning : Contour plots of ISE, IAE and ITAE

QUESTION FROM: Housam Binous | 0 months ago
Chemical Engineering , Control Systems , Engineering , ...
0
REPLIES
1.1K
VIEWS

Possible error in solving Improper integral

QUESTION FROM: José Luis Garrido | 0 months ago BY: Daniel Lichtblau
Calculus , Mathematics , Numerical Computation , Wolfram Language
10
REPLIES
2.2K
VIEWS

Struggling with arbitrary precision in a calculation involving very large and very small numbers

QUESTION FROM: Adam Worthington | 1 year ago BY: Michael Rogers
Calculus , Mathematics , Numerical Computation
1
REPLIES
1.9K
VIEWS

Avoid singularity in TOV equations

QUESTION FROM: Sebastián Moreno Chalacá | 1 year ago
Algebra , Equation Solving , Graphics and Visualization , ...
0
REPLIES
1.3K
VIEWS

Can I embed an inner loop (rather long) in a function that I can then optimize numerically?

QUESTION FROM: Paco Martín | 1 year ago BY: Eric Rimbey
Optimization , Mathematics , Numerical Computation , ...
5
REPLIES
1.9K
VIEWS

Problems with iterative process

QUESTION FROM: Denis Ivanov | 1 year ago BY: Denis Ivanov
Calculus , Mathematics , Numerical Computation , Wolfram Language
3
REPLIES
1.9K
VIEWS

decimal approximations of large numbers

QUESTION FROM: Mark Raygorodsky | 1 year ago
Computer Science , Numerical Computation , Wolfram|Alpha
0
REPLIES
1.8K
VIEWS

Overflow while computing 10^16 digit

QUESTION FROM: Mark Raygorodsky | 1 year ago BY: Michael Rogers
Computer Science , Mathematics , Numerical Computation , ...
8
REPLIES
2.8K
VIEWS

Calculating multivariable calculus surface integrals using Mathematica

QUESTION FROM: Mitchell Sandlin | 1 year ago BY: Mitchell Sandlin
Calculus , Graphics and Visualization , Mathematics , ...
5
REPLIES
3.5K
VIEWS

Solving a 4th- PDE Numerically?

QUESTION FROM: M.A.A Ahmed | 1 year ago
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
0
REPLIES
1.3K
VIEWS

Assistance with solving coupled equations using module with external file

QUESTION FROM: Mohsen Dayyani Kelisani | 1 year ago BY: Mohsen Dayyani Kelisani
Algebra , Equation Solving , Mathematics , Numerical Computation , ...
4
REPLIES
2K
VIEWS

Issue with contour plot

QUESTION FROM: Debojyoti Mondal | 1 year ago BY: Gianluca Gorni
Equation Solving , Graphics and Visualization , Mathematics , ...
1
REPLIES
1.8K
VIEWS

Possible error in solving elliptic integral

QUESTION FROM: José Luis Garrido | 2 years ago BY: Mariusz Iwaniuk
Calculus , Mathematics , Numerical Computation , Wolfram Language
1
REPLIES
1.6K
VIEWS

How to save the Mathematica execution state so that I can stop and later continue from where it was?

QUESTION FROM: Juan Barandiaran | 2 years ago
Import and Export , Optimization , Mathematics , ...
0
REPLIES
2.3K
VIEWS

Considerations for numerically solving a set of differential equation

QUESTION FROM: Mishal Mohanlal | 2 years ago BY: Michael Rogers
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
1
REPLIES
2K
VIEWS

Circular reference in differential equations

QUESTION FROM: Mishal Mohanlal | 2 years ago BY: Michael Rogers
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
3
REPLIES
2.4K
VIEWS

Convection diffusion equation solve in a rectangular domain

QUESTION FROM: Mohammad Yeasin | 2 years ago BY: Henrik Schachner
Algebra , Engineering , Equation Solving , ...
1
REPLIES
1.7K
VIEWS

Plot a numerical integration as a function of variable

QUESTION FROM: Fatemeh Aliyan | 2 years ago BY: Gianluca Gorni
Calculus , Graphics and Visualization , Mathematics , ...
1
REPLIES
1.4K
VIEWS

NSolve won't execute

QUESTION FROM: Leon Fairbanks | 2 years ago BY: Leon Fairbanks
Equation Solving , Mathematics , Numerical Computation , ...
3
REPLIES
2.4K
VIEWS

What is the reason of insufficient memory error while using FindRoot?

QUESTION FROM: Leslaw Bieniasz | 2 years ago BY: Hans Milton
Algebra , Equation Solving , Mathematics , Numerical Computation , ...
8
REPLIES
2.6K
VIEWS

How can i correct this NIntegrate code?

QUESTION FROM: Minaa Askari | 2 years ago BY: Gianluca Gorni
Calculus , Mathematics , Numerical Computation , Wolfram Language
1
REPLIES
1.4K
VIEWS

NIntegrate error while finding fully differential cross section

QUESTION FROM: Minaa Askari | 2 years ago BY: Minaa Askari
Calculus , Mathematics , Numerical Computation , Physics , ...
2
REPLIES
1.8K
VIEWS

Resolving NIntegrate and NSum non-numeric evaluation errors in oscillatory integrands

QUESTION FROM: Reza rho | 2 years ago BY: Michael Rogers
Calculus , Mathematics , Numerical Computation , Wolfram Language
1
REPLIES
2.2K
VIEWS

Increasing efficiency of Monte Carlo simulation of stochastic differential equation

QUESTION FROM: Cameron Turner | 2 years ago
Computer Science , Finance , High-Performance Computing , ...
0
REPLIES
1.9K
VIEWS

NDSolve debugging and help

QUESTION FROM: Ee Kin Chan | 2 years ago BY: Gianluca Gorni
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
3
REPLIES
1.6K
VIEWS

FindRoot on initial values of NDSolve has errors but works, why?

QUESTION FROM: Yumin Tian | 2 years ago BY: Antonio Barletta
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
4
REPLIES
2.4K
VIEWS

Invalid Input error and a result from NExpectation

QUESTION FROM: Paul Studtmann | 2 years ago BY: Michael Rogers
Numerical Computation , Statistics and Probability , Wolfram Language
5
REPLIES
1.8K
VIEWS

Numerical instability in simulation

QUESTION FROM: Ee Kin Chan | 2 years ago
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
0
REPLIES
1.3K
VIEWS

What does TrapezoidalRule at NIntegrate really do?

QUESTION FROM: Joachim Janezic | 2 years ago BY: Joachim Janezic
Calculus , Mathematics , Numerical Computation , Wolfram Language
4
REPLIES
2.2K
VIEWS

Unexpected behaviour from NMaximize optimising a stochastic function

QUESTION FROM: Cameron Turner | 2 years ago BY: Cameron Turner
Optimization , Mathematics , Numerical Computation , Wolfram Language
7
REPLIES
3K
VIEWS

Solving differential equation depending on radial and time parameter

QUESTION FROM: Leo Murphy | 2 years ago BY: Gianluca Gorni
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
5
REPLIES
2.5K
VIEWS

Numerical Integration of interpolated function returning a list

QUESTION FROM: Giorgio Busoni | 2 years ago BY: Michael Rogers
Calculus , Mathematics , Numerical Computation , Wolfram Language
2
REPLIES
1.7K
VIEWS

Numerical solution to Euler Lagrange equation

QUESTION FROM: Ee Kin Chan | 2 years ago BY: Ee Kin Chan
Equation Solving , Mathematics , Numerical Computation , Physics , ...
6
REPLIES
2.2K
VIEWS

What can be the reason of the poor accuracy of NDSolve over the first integration step?

QUESTION FROM: Leslaw Bieniasz | 2 years ago
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
0
REPLIES
1.8K
VIEWS

Extracting values from NDSolve

QUESTION FROM: Mishal Mohanlal | 2 years ago BY: Sangdon Lee
Algebra , Equation Solving , External Programs and Systems , ...
3
REPLIES
3.3K
VIEWS

What is this MeijerG Function

QUESTION FROM: Qiang Lu | 2 years ago BY: Qiang Lu
Calculus , Mathematics , Numerical Computation , Physics , ...
2
REPLIES
1.7K
VIEWS

Error from NDSolve: PDE coefficient doesn't evaluate to numerical value

QUESTION FROM: Nithiya V | 2 years ago BY: Nithiya V
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
6
REPLIES
2.5K
VIEWS

NDSolve documentation example doesn't work on 14.1

QUESTION FROM: Pierre Dehez | 2 years ago BY: Pierre Dehez
Equation Solving , Mathematics , Numerical Computation , ...
3
REPLIES
2.2K
VIEWS

Empty output from ParametricPlot

QUESTION FROM: Malej Est | 2 years ago BY: Malej Est
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
2
REPLIES
1.8K
VIEWS

Giving values of boundary conditions while solving a system of non-linear equations

QUESTION FROM: Nithiya V | 2 years ago BY: Nithiya V
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
17
REPLIES
2.8K
VIEWS

Help with fixed point iterative schemes

QUESTION FROM: Kapil Dhankhar | 2 years ago BY: Kapil Dhankhar
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
4
REPLIES
1.6K
VIEWS

How to customize complex solution regions for NDSolve like the example in Mathematica？

QUESTION FROM: HAO XU | 2 years ago BY: HAO XU
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
5
REPLIES
2.1K
VIEWS

Solving stationary heat equation (Laplace-Equation) with 2 regions and 2 different materials

QUESTION FROM: Dirk Brömme | 2 years ago BY: Dirk Brömme
Calculus , Engineering , Equation Solving , ...
1
REPLIES
2K
VIEWS

NDSolveValue error: fewer dependent variables

QUESTION FROM: Abid Hussain | 2 years ago BY: Michael Rogers
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
4
REPLIES
2K
VIEWS

Numerically solved PDE of Ornstein–Uhlenbeck process on simplex violates conservation of probability

QUESTION FROM: Cameron Turner | 2 years ago BY: Cameron Turner
Calculus , Equation Solving , Finance , Mathematics , ...
12
REPLIES
4.1K
VIEWS

How can I add a plot label inside the plot?

QUESTION FROM: J Prakash | 2 years ago BY: Michael Rogers
Calculus , Equation Solving , Graphics and Visualization , ...
5
REPLIES
2K
VIEWS

Problem solving partial differential equation

QUESTION FROM: Dirk Brömme | 2 years ago BY: Dirk Brömme
Calculus , Equation Solving , Graphics and Visualization , ...
7
REPLIES
2.9K
VIEWS

Det::luc result for Det of badly conditioned matrix

QUESTION FROM: Cesar Lozada | 2 years ago BY: Cesar Lozada
Algebra , Mathematics , Numerical Computation , Wolfram Language
4
REPLIES
2.6K
VIEWS

NDSolveValue::litarg To avoid possible ambiguity, ... dependent variable in DirichletCondition

QUESTION FROM: David Johnson | 2 years ago BY: Michael Rogers
Calculus , Engineering , Equation Solving , ...
4
REPLIES
2.6K
VIEWS

How do I tune my NDSolve code to start fast, so it can be run hundreds of times?

QUESTION FROM: Kaden Tro | 2 years ago BY: Gareth Russell
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
3
REPLIES
3K
VIEWS

How can i make this code faster?

QUESTION FROM: Raghad Al-amri | 2 years ago
Calculus , Graphics and Visualization , Mathematics , ...
0
REPLIES
1.6K
VIEWS

Problem with the acceleration of a system

QUESTION FROM: Vasile Riccardo Duceac | 2 years ago BY: Sergio Vargas
Calculus , Control Systems , Equation Solving , ...
1
REPLIES
3.3K
VIEWS

Error 1/0 encountered while plotting solution of differential equations

QUESTION FROM: Vasile Riccardo Duceac | 2 years ago BY: Michael Rogers
Calculus , Mathematics , Numerical Computation , Wolfram Language
3
REPLIES
2.7K
VIEWS

Plot doesn't show function and Nintegrate will not try?

QUESTION FROM: Kari Karhi | 2 years ago BY: Mariusz Iwaniuk
Calculus , Graphics and Visualization , Mathematics , ...
1
REPLIES
1.9K
VIEWS

How can I solve a system of ODE system using RKF45 method with shoting technique?

QUESTION FROM: J Prakash | 2 years ago BY: Michael Rogers
Calculus , Equation Solving , Graphics and Visualization , ...
1
REPLIES
2K
VIEWS

Tilting beam with the center of mass over an edge

QUESTION FROM: Felix Toperczer | 2 years ago
Calculus , Dynamic Interactivity , Equation Solving , ...
0
REPLIES
1.4K
VIEWS

Plot the solution of a differential equation

QUESTION FROM: Ian P | 2 years ago BY: Gianluca Gorni
Calculus , Equation Solving , Graphics and Visualization , ...
7
REPLIES
2.8K
VIEWS

Numerical Simulation of Damped, Driven Nonlinear Waves with Extended Initial Conditions

QUESTION FROM: Athanasios Paraskevopoulos | 2 years ago
Equation Solving , Graphics and Visualization , Mathematics , ...
0
REPLIES
1.9K
VIEWS

Can anyone verify these factors of the largest RSA number on Wikipedia?

QUESTION FROM: Bobby Joe Snyder | 2 years ago
Algebra , Data Science , Equation Solving , Mathematics , ...
0
REPLIES
2.3K
VIEWS

Solving nonlinear equation with integrals and beta functions

QUESTION FROM: Muhammad Fahem Bin Musa | 2 years ago BY: Bill Nelson
Algebra , Calculus , Equation Solving , Mathematics , ...
6
REPLIES
2.4K
VIEWS

NCaputoD function is based on Caputo L1 scheme or Caputo predictor-corrector scheme?

QUESTION FROM: G Velmurugan | 2 years ago BY: Mariusz Iwaniuk
Calculus , Mathematics , Numerical Computation
1
REPLIES
1.9K
VIEWS

Error using NDSolve

QUESTION FROM: J McDonald | 2 years ago BY: EDITORIAL BOARD
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
2
REPLIES
1.9K
VIEWS

NSolve and FindRoot unable to solve system of trig equations

QUESTION FROM: Alice Wang | 2 years ago BY: Gianluca Gorni
Algebra , Equation Solving , Mathematics , Numerical Computation , ...
2
REPLIES
2.3K
VIEWS

Why does nested Integration works for a single function but not for a list of functions ?

QUESTION FROM: Aka Kopejkin | 2 years ago BY: Aka Kopejkin
Calculus , Mathematics , Numerical Computation , Wolfram Language
5
REPLIES
3.1K
VIEWS

A machine learning framework based on physical information: a little problem!

QUESTION FROM: Zhang Haoyu | 2 years ago BY: Zhang Haoyu
Data Science , Graphics and Visualization , Neural Networks , ...
4
REPLIES
3K
VIEWS

Constrained minimization of a function whose minimum is exactly zero

QUESTION FROM: Alfred Svarc | 2 years ago BY: Alfred Svarc
Equation Solving , Optimization , Mathematics , ...
1
REPLIES
1.9K
VIEWS

Why my IAE plot is off with respect to result by Dorf and Bishop?

QUESTION FROM: Housam Binous | 2 years ago BY: Housam Binous
Chemistry , Control Systems , Engineering , ...
3
REPLIES
2.6K
VIEWS

EM wave through free space propagation

QUESTION FROM: Ruslan Lagashkin | 2 years ago BY: Paul Abbott
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
1
REPLIES
2.9K
VIEWS

Table of NSolve (and Solve) solutions creates extra unknown answers

QUESTION FROM: Ilan Riess | 2 years ago BY: Ilan Riess
Algebra , Equation Solving , Mathematics , Numerical Computation , ...
6
REPLIES
2.6K
VIEWS

Suggestion: function for Whittaker's root series formula

QUESTION FROM: Raul Prisacariu | 2 years ago BY: Daniel Lichtblau
Mathematics , Numerical Computation , Wolfram|Alpha , Wolfram Language
1
REPLIES
3.4K
VIEWS

NDSolve error inside Plot: $RecursionLimit :Recursion depth of 1024 exceeded

QUESTION FROM: jony will | 2 years ago BY: jony will
Calculus , Graphics and Visualization , Mathematics , ...
5
REPLIES
3.3K
VIEWS
1
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