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Equation Solving
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Symbolic and numerical equation solving and root finding, differential equations, recurrence and functional equations, systems of equations, linear systems, visualization of solutions...

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NDSolve problem: different results with different time integration

QUESTION FROM: luca civati | 11 years ago
Aerospace Engineering , Civil Engineering , Engineering , ...
0
REPLIES
6.8K
VIEWS

Please let me know why Mathematica gives error message!

QUESTION FROM: Changsoo Lee | 10 years ago BY: Changsoo Lee
Equation Solving , Numerical Computation , Wolfram Language
4
REPLIES
6.8K
VIEWS

How to solve/input this PDE's problem on MATHEMATICA

QUESTION FROM: Pamela Vilela | 9 years ago
Calculus , Equation Solving , Mathematica , Mathematics , ...
0
REPLIES
6.8K
VIEWS

Index an arbitrary array in NDSolve to simulate white noise?

QUESTION FROM: Sandip Roy | 7 years ago BY: Daniel Lichtblau
Equation Solving , Mathematics , Numerical Computation , ...
7
REPLIES
6.8K
VIEWS

How to use Solve correctly?

QUESTION FROM: john massucci | 9 years ago BY: Bill Simpson
Equation Solving , Mathematics , Wolfram Language
2
REPLIES
6.8K
VIEWS

Calculate and plot the roots of a polynomial?

QUESTION FROM: Pasquale Rossi | 7 years ago BY: Rohit Namjoshi
Calculus , Equation Solving , Graphics and Visualization , ...
3
REPLIES
6.8K
VIEWS

Some ideas for a next gen Wolfram Language

QUESTION FROM: flyredeagle flyredeagle | 4 years ago BY: Brad Klee
Algebra , Equation Solving , Mathematica , Numerical Computation , ...
1
REPLIES
6.8K
VIEWS

Equations with matrices

QUESTION FROM: B. P. | 5 years ago BY: Michael Helmle
Algebra , Equation Solving , Mathematics , Symbolic Computations , ...
4
REPLIES
6.8K
VIEWS

DSolve for y'[x] == (x^2 + xy[x] + 4 y[x]^2)/x^2

QUESTION FROM: D G | 11 years ago BY: Bill Simpson
Equation Solving , Mathematica , Mathematics , Wolfram Language
6
REPLIES
6.8K
VIEWS

Solve the following nonlinear parabolic PDE with DSolve?

QUESTION FROM: Fabi An | 5 years ago BY: Anonymous User
Equation Solving , Mathematics , Symbolic Computations , ...
3
REPLIES
6.8K
VIEWS

Obtain exact values for a multivariable optimization problem?

QUESTION FROM: Dave Markham | 6 years ago BY: Neil Singer
Calculus , Equation Solving , Optimization , Mathematics , ...
2
REPLIES
6.8K
VIEWS

Fix this numerical analysis approach for Newton's gravity equation?

QUESTION FROM: Joshua Champion | 6 years ago BY: Neil Singer
Equation Solving , Mathematics , Numerical Computation , ...
2
REPLIES
6.8K
VIEWS

On the use of WhenEvent[]

QUESTION FROM: J Jesus Rico-Melgoza | 4 years ago BY: J Jesus Rico-Melgoza
Control Systems , Equation Solving , Logic and Boolean Algebra , ...
2
REPLIES
6.8K
VIEWS

[WSS21] Finding zeros with domain coloring and winding numbers

CONTRIBUTED BY: Garrett Dubofsky | 4 years ago BY: EDITORIAL BOARD
Staff Picks , Discrete Mathematics , Equation Solving , ...
1
REPLIES
6.8K
VIEWS

Graphing a Quadratic

QUESTION FROM: Jaewon Sim | 11 years ago BY: Dana DeLouis
Calculus , Equation Solving , Graphics and Visualization , ...
5
REPLIES
6.8K
VIEWS

Integrate this equation using the Wolfram Language?

QUESTION FROM: Nurul Ainina | 9 years ago BY: Nurul Ainina
Calculus , Equation Solving , Mathematics , Symbolic Computations , ...
12
REPLIES
6.8K
VIEWS

Solve a system of 5 linear & non-linear equations

QUESTION FROM: Christos Papahristodoulou | 6 years ago BY: Christos Papahristodoulou
Equation Solving , Mathematics , Numerical Computation , ...
5
REPLIES
6.8K
VIEWS

Calculate (A*Nabla)B ?

QUESTION FROM: mkssion | 8 years ago BY: Ivan Siahlo
Calculus , Equation Solving , Mathematics , Wolfram Language
1
REPLIES
6.8K
VIEWS

Absolute value within Solve function

QUESTION FROM: Indrek Morell | 12 years ago BY: Frank Kampas
Equation Solving , Mathematics
1
REPLIES
6.7K
VIEWS

Find error in "NDsolve"

QUESTION FROM: Lina Lili | 5 years ago BY: Hans Dolhaine
Control Systems , Equation Solving , Mathematics , ...
4
REPLIES
6.7K
VIEWS

An unsolicited Wolfram Alpha testimonial ...

CONTRIBUTED BY: Mark Tuttle | 11 years ago
Education , Equation Solving , Wolfram|Alpha
0
REPLIES
6.7K
VIEWS

Simplify my integrand to make the function Integrate[] work?

QUESTION FROM: Sida Liu | 6 years ago BY: Sida Liu
Calculus , Equation Solving , Mathematics , Physics , Wolfram Language
2
REPLIES
6.7K
VIEWS

How to know if a point is in-between 2 3D parallel planes ?

QUESTION FROM: Florent B | 5 years ago BY: Ta'a Nwa Dombou
Algebra , Calculus , Equation Solving , Graphs and Networks , ...
6
REPLIES
6.7K
VIEWS

[?] Simplify InverseZTransform output?

QUESTION FROM: K M | 8 years ago BY: K M
Equation Solving , Mathematics , Signal Processing , ...
2
REPLIES
6.7K
VIEWS

[WSS21] Use neural network to predict the solution of partial differential

CONTRIBUTED BY: Alireza Bafandeh | 1 year ago BY: Faz 1
Staff Picks , Artificial Intelligence , Calculus , Data Science , ...
2
REPLIES
6.7K
VIEWS

Suggest NDSolve Method options when argument contains InverseFunction?

QUESTION FROM: Mervin Hanson | 9 years ago BY: Mervin Hanson
Equation Solving , Graphics and Visualization , ...
6
REPLIES
6.7K
VIEWS

Efficient way to solve parametric equations?

QUESTION FROM: Julian Stuermer | 11 years ago BY: Updating Name
Equation Solving , Mathematica , Numerical Computation
4
REPLIES
6.7K
VIEWS

Get an implicit derivative?

QUESTION FROM: Roberto Rivero | 5 years ago BY: Hans Dolhaine
Calculus , Equation Solving , Symbolic Computations , Wolfram Language
5
REPLIES
6.7K
VIEWS

Solve decoupled PDE's with NDSolve?

QUESTION FROM: Eric Smith | 7 years ago BY: Eric Smith
Equation Solving , Mathematics , Numerical Computation , ...
7
REPLIES
6.7K
VIEWS

Plot a stream function?

QUESTION FROM: Nurul Ainina | 8 years ago BY: Gianluca Gorni
Equation Solving , Graphics and Visualization , Mathematics , ...
3
REPLIES
6.7K
VIEWS

Unknown error in NDSolve and other issues

QUESTION FROM: Konstantin Nosov | 11 years ago BY: Konstantin Nosov
Equation Solving , Mathematica , Numerical Computation
3
REPLIES
6.7K
VIEWS

Ordering of solutions for quartics when using Root

QUESTION FROM: Yuriy Ivanov | 11 years ago BY: David J M Park Jr
Algebra , Calculus , Equation Solving , Mathematica , Mathematics , ...
2
REPLIES
6.7K
VIEWS

Symbolic substitution with differential equations?

QUESTION FROM: Jean Guy Lussier | 9 years ago BY: Jean Guy Lussier
Algebra , Calculus , Equation Solving , Mathematics , Physics , ...
8
REPLIES
6.7K
VIEWS

Compute transfer function of a linear system analytically?

QUESTION FROM: Denis von Arx | 7 years ago BY: Denis von Arx
Control Systems , Equation Solving , Mathematics , ...
1
REPLIES
6.7K
VIEWS

Solve a Saint-Venant PDE with NDSolve?

QUESTION FROM: Martin Laabs | 7 years ago BY: Martin Laabs
Equation Solving , Mathematics , Numerical Computation , ...
3
REPLIES
6.7K
VIEWS

Can Mathematica modify lightly the inital conditions of NDSolve??

QUESTION FROM: Arnau Jim | 10 years ago BY: Frank Kampas
Calculus , Equation Solving , Mathematica , Numerical Computation , ...
4
REPLIES
6.7K
VIEWS

[WSS20] Product line optimization for a monopoly firm

CONTRIBUTED BY: Monir Jalili | 3 years ago BY: EDITORIAL BOARD
Staff Picks , Dynamic Interactivity , Economics , Equation Solving , ...
1
REPLIES
6.7K
VIEWS

[?] Solve an equation with a constraint?

QUESTION FROM: Alex Graham | 6 years ago BY: Mariusz Iwaniuk
Equation Solving , Mathematics , Wolfram Language
3
REPLIES
6.7K
VIEWS

A graphical solution of two equations is possible. Numerically, too?

QUESTION FROM: Niels Nutzer | 12 years ago BY: Frank Kampas
Algebra , Equation Solving , Mathematica , Mathematics , ...
3
REPLIES
6.7K
VIEWS

[?] Sum and Solve the following expression?

QUESTION FROM: Neil Spalter | 8 years ago BY: Jim Baldwin
Equation Solving , Mathematics , Wolfram Language
4
REPLIES
6.7K
VIEWS

Solve the following problem with boundary condition using version 11.01.?

QUESTION FROM: claygruesbeck | 8 years ago BY: claygruesbeck
Equation Solving , Graphics and Visualization , Mathematics , ...
5
REPLIES
6.7K
VIEWS

How to find the intersection point of four equations?

QUESTION FROM: Sunanda Lakkimsetti | 4 years ago BY: Sunanda Lakkimsetti
Equation Solving , Mathematica , Mathematics , ...
13
REPLIES
6.6K
VIEWS

How do I solve a profile interval (statistics)

QUESTION FROM: Casper YC | 11 years ago BY: Casper YC
Equation Solving , Mathematics , Numerical Computation , ...
4
REPLIES
6.6K
VIEWS

plotting motion of two charged particles

QUESTION FROM: Hayashi Yoshiaki | 11 years ago BY: Hayashi Yoshiaki
Calculus , Equation Solving , Graphics and Visualization , ...
2
REPLIES
6.6K
VIEWS

Spherical harmonics interpolation method that minimizes an energy function

CONTRIBUTED BY: Rauan Kaldybaev | 4 years ago BY: EDITORIAL BOARD
Staff Picks , Calculus , Equation Solving , ...
1
REPLIES
6.6K
VIEWS

DSolve & DSolveValue producing an unusual multiplier in solution?

QUESTION FROM: Mitchell Sandlin | 6 years ago BY: Michael Rogers
Calculus , Equation Solving , Mathematics , Wolfram Language
1
REPLIES
6.6K
VIEWS

Solving polynomial equations of 15 variables, long time, no output

QUESTION FROM: Vicky Wei | 3 years ago BY: Daniel Lichtblau
Algebra , Equation Solving , Mathematics , Tuning and Debugging , ...
3
REPLIES
6.6K
VIEWS

NDSolve piecewise differential equations associated with a water hammer?

QUESTION FROM: srinivas.gk | 6 years ago BY: srinivas.gk
Calculus , Engineering , Equation Solving , Mathematics , ...
2
REPLIES
6.6K
VIEWS

NDSolve misbehaviour

QUESTION FROM: Marc Widdowson | 5 years ago BY: Hans Dolhaine
Equation Solving , Graphics and Visualization , Wolfram Language
5
REPLIES
6.6K
VIEWS

Extract the real solutions among many which are complex?

QUESTION FROM: Hong-Yee Chiu | 7 years ago BY: Hong-Yee Chiu
Equation Solving , Mathematics , Physics , Wolfram Language
6
REPLIES
6.6K
VIEWS

Dividing a square into similar but unequal pieces

CONTRIBUTED BY: Ed Pegg | 3 years ago BY: EDITORIAL BOARD
Staff Picks , Equation Solving , Graphics and Visualization , ...
2
REPLIES
6.6K
VIEWS

Transcendental equation cannot be solved?

QUESTION FROM: Zhenyu Zeng | 3 years ago BY: Daniel Lichtblau
Algebra , Equation Solving , Mathematics , Symbolic Computations , ...
10
REPLIES
6.6K
VIEWS

A problem of FindRoot with BSplineFunction

QUESTION FROM: Jianhua Yang | 3 years ago BY: Alexey Popkov
Equation Solving , Mathematics , Numerical Computation , ...
9
REPLIES
6.6K
VIEWS

[FSWS23]Diagrammatic & computational study of Abrikosov vortex interactions

CONTRIBUTED BY: Gianni Tallarita | 1 year ago BY: Jarek Duda
Staff Picks , Data Science , Equation Solving , ...
5
REPLIES
6.6K
VIEWS

Restrict NDSolve to Answers in the Real Domain

QUESTION FROM: Robin Hartley | 10 years ago BY: Michael Rogers
Equation Solving , Wolfram Language
1
REPLIES
6.6K
VIEWS

Which method does Mathematica use in NSolve for one variable functions?

QUESTION FROM: selahittin cinar | 12 years ago BY: selahittin cinar
Equation Solving , Mathematica , Mathematics
2
REPLIES
6.6K
VIEWS

Help solving system of 3 differential equations?

QUESTION FROM: Diogo Carvalho | 4 years ago BY: xzczd 　
Calculus , Equation Solving , Numerical Computation , Wolfram Language
4
REPLIES
6.6K
VIEWS

Help with programming (finding roots)

QUESTION FROM: cleveland cav | 11 years ago BY: David Keith
Equation Solving , Optimization , Mathematics , Wolfram Language
2
REPLIES
6.6K
VIEWS

Using NSolve to solve equation given by power series?

QUESTION FROM: Anonymous User | 4 years ago BY: Anonymous User
Algebra , Equation Solving , Graphics and Visualization , ...
8
REPLIES
6.6K
VIEWS

Efficiently solve this system of quadratic equations?

QUESTION FROM: C W | 6 years ago BY: Daniel Lichtblau
Equation Solving , Mathematics , Wolfram Language
11
REPLIES
6.6K
VIEWS

How to plot multiple equilibria?

QUESTION FROM: Juan Lopez | 9 years ago BY: Gianluca Gorni
Economics , Equation Solving , Graphics and Visualization , ...
1
REPLIES
6.6K
VIEWS

Solve four interconnected PDEs with initial and boundary condition

QUESTION FROM: Jarek Vrba | 5 years ago BY: Konstantin Solovev
Calculus , Equation Solving , Mathematics , Modeling , Physics , ...
1
REPLIES
6.6K
VIEWS

How do I control the step size of NDSolve at a differential equation?

QUESTION FROM: Dia Ghosh | 9 years ago BY: Dia Ghosh
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
2
REPLIES
6.5K
VIEWS

Transverse beam vibration: Dynamic Euler-Bernoulli equation

QUESTION FROM: Alan SAILLET | 5 years ago BY: Anonymous User
Equation Solving , Mathematics , Physics , Wolfram Language
6
REPLIES
6.5K
VIEWS

Simplify sum expression containing Kronecker delta?

QUESTION FROM: Michael Helmle | 6 years ago BY: Michael Helmle
Algebra , Equation Solving , Mathematics , Symbolic Computations , ...
8
REPLIES
6.5K
VIEWS

Question of NDSolve limitation: are there any major ones?

QUESTION FROM: Anonymous User | 7 years ago BY: Anonymous User
Equation Solving , Mathematics , Numerical Computation , ...
2
REPLIES
6.5K
VIEWS

Solving three equations

QUESTION FROM: S Sarkar | 4 years ago BY: Hans Dolhaine
Algebra , Equation Solving , Mathematics , Wolfram Language
6
REPLIES
6.5K
VIEWS

[?] Solve the following transcendental equation?

QUESTION FROM: ismail ali | 6 years ago BY: Gianluca Gorni
Equation Solving , Mathematics , Wolfram|Alpha , Wolfram Language
2
REPLIES
6.5K
VIEWS

Simplify a complicated solution by a simpler way?

QUESTION FROM: Jacques Ou | 8 years ago BY: EDITORIAL BOARD
Equation Solving , Mathematics , Symbolic Computations , ...
7
REPLIES
6.5K
VIEWS

Get the correct output using Dsolve?

QUESTION FROM: Mirza Farrukh Baig | 5 years ago BY: Mirza Farrukh Baig
Equation Solving , Mathematics , Symbolic Computations , ...
5
REPLIES
6.5K
VIEWS

Solving ordinary differential equations [growth equation]

QUESTION FROM: Brendan John | 11 years ago BY: Arturo Ramos
Calculus , Equation Solving , Mathematica , Wolfram Language
6
REPLIES
6.5K
VIEWS

Frobenius and power series solutions to ODEs

CONTRIBUTED BY: Rauan Kaldybaev | 5 years ago BY: EDITORIAL BOARD
Staff Picks , Calculus , Equation Solving , Mathematics , ...
1
REPLIES
6.5K
VIEWS

Solve equality involving Euler's angles?

QUESTION FROM: S G | 6 years ago BY: Michael Helmle
Equation Solving , Geometry , Mathematics , Wolfram Language
3
REPLIES
6.5K
VIEWS

How to solve these simultaneous equations?

QUESTION FROM: rr003035 | 11 years ago BY: David Keith
Algebra , Equation Solving , Mathematica , Wolfram Language
6
REPLIES
6.5K
VIEWS

How do you solve a large nonlinear system of equations faster than NSolve?

QUESTION FROM: Imran Khan | 9 years ago BY: David Keith
Equation Solving , Wolfram Language
1
REPLIES
6.5K
VIEWS

Can you parallelize a numerically solved Integral?

QUESTION FROM: sorabella91 | 4 years ago BY: Updating Name
Calculus , Equation Solving , High-Performance Computing , ...
3
REPLIES
6.5K
VIEWS

Can anyone please check my code and help me? about NDSolve and Plot

QUESTION FROM: nffddn | 11 years ago BY: Marco Thiel
Calculus , Equation Solving , Graphics and Visualization , ...
2
REPLIES
6.5K
VIEWS

Gravitational Redshift Originating from Sirius

CONTRIBUTED BY: Wim Vegt | 2 years ago BY: Wim Vegt
Astronomy , Calculus , Education , Equation Solving , Mathematics , ...
2
REPLIES
6.5K
VIEWS

Fractal curves at rational points & similarly recursively-defined functions

CONTRIBUTED BY: Bill Gosper | 9 years ago
Staff Picks , Computer-Based Maths , Equation Solving , Geometry , ...
0
REPLIES
6.5K
VIEWS

NDSolve laplacian equation on meshed boundary?

QUESTION FROM: Yahyaoui Hamza | 7 years ago BY: Tim Laska
Engineering , Equation Solving , Mathematics , Modeling , ...
1
REPLIES
6.5K
VIEWS

Simplify 3rd order ODE to v''' + Z v = F a general formula

CONTRIBUTED BY: Rauan Kaldybaev | 4 years ago BY: EDITORIAL BOARD
Staff Picks , Algebra , Calculus , Equation Solving , ...
1
REPLIES
6.5K
VIEWS

[?] Decouple the differential equations by using Dsolve?

QUESTION FROM: Mirza Farrukh Baig | 7 years ago BY: Mirza Farrukh Baig
Calculus , Equation Solving , Mathematics , Symbolic Computations , ...
9
REPLIES
6.5K
VIEWS

Expound on function BinarySearch[list,key, Function]?

QUESTION FROM: Gerald Kamin | 8 years ago BY: Daniel Lichtblau
Discrete Mathematics , Equation Solving , Optimization , ...
2
REPLIES
6.5K
VIEWS

The fragility of an incomplete monetary union

CONTRIBUTED BY: Jamel Saadaoui | 2 years ago BY: Jamel Saadaoui
Staff Picks , Algebra , Economics , Equation Solving , ...
6
REPLIES
6.5K
VIEWS

Solve definite Integrals of large symbolic equations?

QUESTION FROM: Jacob Switzer | 7 years ago BY: Alexander Trounev
Algebra , Calculus , Equation Solving , Mathematics , ...
3
REPLIES
6.4K
VIEWS

Does NDSolve have an upper limit requirement of the number of equations?

QUESTION FROM: Lammond Wan | 7 years ago BY: Michael Rogers
Equation Solving , Mathematics , Numerical Computation , ...
9
REPLIES
6.4K
VIEWS

Solve a differential equation at specific point?

QUESTION FROM: Paula Cocoma | 8 years ago BY: Paula Cocoma
Equation Solving , Mathematics , Wolfram Language
5
REPLIES
6.4K
VIEWS

Colebrook equation

QUESTION FROM: LUIS ARBOLEDA | 5 years ago BY: LUIS ARBOLEDA
Engineering , Equation Solving , Mathematics , Wolfram Language
6
REPLIES
6.4K
VIEWS

Replace terms within a polynomial function with other terms?

QUESTION FROM: Syed Muhammad Hilmi Syed Anera | 9 years ago BY: Sander Huisman
Calculus , Equation Solving , Mathematics , Symbolic Computations , ...
2
REPLIES
6.4K
VIEWS

Finalizing design of DepthFirstSearch: a Backtrack search function

CONTRIBUTED BY: Brad Klee | 3 years ago BY: Dean Gladish
Staff Picks , Computer Science , Discrete Mathematics , ...
3
REPLIES
6.4K
VIEWS

Finding x-intercepts of epicycloid

QUESTION FROM: Bryan Lettner | 11 years ago BY: David Keith
Equation Solving , Geometry , Mathematica , Mathematics
4
REPLIES
6.4K
VIEWS

How to solve a highly nonlinear PDE

QUESTION FROM: Yiyang Zhang | 12 years ago BY: Sean Clarke
Equation Solving , Mathematica , Mathematics , ...
4
REPLIES
6.4K
VIEWS

Incorrect solution, how to control such behaviour of the Solve function?

QUESTION FROM: Albert Lebedev | 5 years ago BY: Albert Lebedev
Algebra , Equation Solving , Mathematics , Symbolic Computations , ...
3
REPLIES
6.4K
VIEWS

Current CO2 emission will increase CO2 concentration cubically

CONTRIBUTED BY: Sangdon Lee | 2 years ago BY: Sangdon Lee
Staff Picks , Calculus , Environmental Science , Equation Solving , ...
6
REPLIES
6.4K
VIEWS

Solve doesn't like roots

QUESTION FROM: Frank Kampas | 3 years ago BY: Zhenyu Zeng
Algebra , Equation Solving , Mathematics , Tuning and Debugging , ...
20
REPLIES
6.4K
VIEWS

Solve $y'' -2*(x^4-e)y = 0$ 2nd order non-linear differential equation?

QUESTION FROM: Hengameh Bagherianlemraski | 8 years ago BY: Hengameh Bagherianlemraski
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
6
REPLIES
6.4K
VIEWS

Compute accurately Exp[x^2]*Erfc[x] in a wide range of x?

QUESTION FROM: Leslaw Bieniasz | 8 years ago BY: Mariusz Iwaniuk
Equation Solving , Mathematics , Symbolic Computations , ...
9
REPLIES
6.4K
VIEWS

Avoid problem with boundary conditions in NDSolve[ ]?

QUESTION FROM: Jeiveison Maia | 9 years ago BY: Yehuda Ben-Shimol
Calculus , Equation Solving , Mathematics , Modeling , ...
1
REPLIES
6.4K
VIEWS

Reproduce the StateSpaceModel example given in the documentation?

QUESTION FROM: Michael Helmle | 6 years ago BY: Neil Singer
Control Systems , Equation Solving , Mathematica , Modeling , ...
3
REPLIES
6.4K
VIEWS

Error in NDSolveValue[ ]: solve the heat equation in 2D?

QUESTION FROM: Alexandre Barboteu | 4 years ago BY: Lissa de Souza Campos
Calculus , Equation Solving , Graphics and Visualization , ...
6
REPLIES
6.4K
VIEWS
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