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Mathematica creating an ellipse

QUESTION FROM: Radek Drozd | 11 years ago BY: Radek Drozd
Geometry , Mathematica , Mathematics , Wolfram Language
62
REPLIES
27.9K
VIEWS

Sum positive elements of a list efficiently?

QUESTION FROM: Valeriu Ungureanu | 9 years ago BY: Valeriu Ungureanu
Computer-Based Maths , Education , Mathematics , Wolfram Language
48
REPLIES
15.1K
VIEWS

Solve and NSolve not working well with Quantity and Units?

QUESTION FROM: Francis Bush | 5 years ago BY: Daniel Lichtblau
Algebra , Equation Solving , Mathematics , Numerical Computation , ...
44
REPLIES
17K
VIEWS

How do I simulate with three dependent differential equations in Mathematica

QUESTION FROM: Scott Klakamp | 1 year ago BY: Scott Klakamp
Biological Sciences , Calculus , Mathematics , Wolfram Language
42
REPLIES
5.1K
VIEWS

Invert a 2x2 matrix with 2x2 matrix elements?

QUESTION FROM: stan gianzero | 6 years ago BY: stan gianzero
Algebra , Mathematics , Wolfram Language
39
REPLIES
20.7K
VIEWS

Imperfect Bose gas nonlinear Schroedinger type ODE numerical solution

QUESTION FROM: Mattia Udina | 10 years ago BY: Michael Trott
Calculus , Mathematics , Numerical Computation , Physics , ...
37
REPLIES
17.4K
VIEWS

Factorial equations issues

QUESTION FROM: Valeriu Ungureanu | 9 years ago BY: Valeriu Ungureanu
Equation Solving , Mathematics , Wolfram Language
35
REPLIES
13.6K
VIEWS

Multiplying 4x4 matrices with complicated elements - taking long time

QUESTION FROM: Eleanor Holmes | 9 years ago BY: Eleanor Holmes
Equation Solving , High-Performance Computing , Optimization , ...
35
REPLIES
14.9K
VIEWS

Maximize a function with multinomial conditions?

QUESTION FROM: Alex Graham | 6 years ago BY: Frank Kampas
Optimization , Mathematics , Wolfram Language
34
REPLIES
11.2K
VIEWS

How to force Mathematica calculations in Reals domain only ?

QUESTION FROM: Stefano Bertolucci | 10 years ago BY: EDITORIAL BOARD
Mathematica , Mathematics , Wolfram Language
34
REPLIES
46.8K
VIEWS

Improve neural network performance with Mathematica 11.3 ?

QUESTION FROM: David Proffer | 7 years ago BY: Conrad Taylor
Computer Science , Data Science , External Programs and Systems , ...
30
REPLIES
30.3K
VIEWS

Solve an non-homogeneous system of equations mod Z (integers)

QUESTION FROM: Hongyi Zhao | 1 year ago BY: Daniel Lichtblau
Algebra , Equation Solving , Mathematics , Wolfram Language
29
REPLIES
8.6K
VIEWS

Why doesn't RegionPlot plot the region?

QUESTION FROM: Jay Gourley | 4 years ago BY: Martijn Froeling
Geometry , Graphics and Visualization , Mathematics , Wolfram Language
29
REPLIES
14.1K
VIEWS

Runge Kutta method for a system

QUESTION FROM: Vedat Erturk | 4 years ago BY: Hans Dolhaine
Algebra , Equation Solving , Mathematics , Wolfram Language
28
REPLIES
7.2K
VIEWS

Nested For loop to plot multiple plots on a single graph

QUESTION FROM: Abiy Zeleke | 5 years ago BY: Abiy Zeleke
Equation Solving , Graphics and Visualization , Mathematics , ...
27
REPLIES
10K
VIEWS

Recursive law to calculate derivatives of Spherical Harmonics

QUESTION FROM: Shimon Rubin | 10 years ago BY: Shimon Rubin
Mathematics
27
REPLIES
13.8K
VIEWS

Place an equation on a Plot?

QUESTION FROM: Peter Munro | 8 years ago BY: Neil Singer
Graphics and Visualization , Mathematics , Wolfram Language
26
REPLIES
23.8K
VIEWS

How to build a loop for a convergence (centroid calculation)

QUESTION FROM: Antonio de Oliveira | 9 years ago BY: David Keith
Astronomy , Image Processing , Mathematics , Optics , Wolfram Language
26
REPLIES
15.7K
VIEWS

Fit ellipse to a cloud of points

QUESTION FROM: Radek Drozd | 11 years ago BY: Radek Drozd
Geometry , Graphics and Visualization , Mathematica , Optimization , ...
26
REPLIES
12.6K
VIEWS

Solve analytically the following partial differential equations (PDE's)?

QUESTION FROM: Mirza Farrukh Baig | 1 year ago BY: Tom Water
Calculus , Equation Solving , Mathematics , Symbolic Computations , ...
25
REPLIES
21.7K
VIEWS

Solve integral with Bessel functions?

QUESTION FROM: Leslaw Bieniasz | 9 years ago BY: Sander Huisman
Calculus , Mathematics , Symbolic Computations , Wolfram Language
25
REPLIES
9.6K
VIEWS

Non-linear equation system for a two link manipulator

QUESTION FROM: Muhammad Farid | 12 years ago BY: farid khattak
Equation Solving , Mathematica , Mathematics , Wolfram Language
24
REPLIES
8.1K
VIEWS

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

QUESTION FROM: Mark Raygorodsky | 4 months ago BY: Mark Raygorodsky
Computer Science , Mathematics , Numerical Computation , ...
23
REPLIES
1.4K
VIEWS

How can I get to new lists?

QUESTION FROM: M.A. Ghorbani | 6 years ago BY: Alex Teymouri
Civil Engineering , Economics , Engineering , Know-How , ...
23
REPLIES
14.1K
VIEWS

Get numerical solution of PDE for diffusion at high diffusion rates?

QUESTION FROM: Rutton Patel | 6 years ago BY: Rutton Patel
Calculus , Chemistry , Equation Solving , Mathematics , Modeling , ...
23
REPLIES
17.9K
VIEWS

What is the correct ContourPlot here? Where should I assign my parameters?

QUESTION FROM: Emmanuel Guilleminot | 8 years ago BY: Emmanuel Guilleminot
Graphics and Visualization , Mathematics , Physics , Wolfram Language
23
REPLIES
9.6K
VIEWS

[?] NSolve[2x== 0,x] return {{}} in Mathematica 11.0.1?

QUESTION FROM: Gijsbert Wiesenekker | 8 years ago BY: Walter Haeffner
Equation Solving , Mathematica , Mathematics , ...
23
REPLIES
21.1K
VIEWS

Making percolation paths visible

QUESTION FROM: J F | 10 years ago BY: Daniel Lichtblau
Mathematics
23
REPLIES
14.5K
VIEWS

How can Wolfram|Alpha get all 5 solutions?

QUESTION FROM: Sergey Berezin | 3 years ago BY: Sergey Berezin
Algebra , Equation Solving , Mathematics , Wolfram|Alpha
22
REPLIES
9.8K
VIEWS

What is needed to get a^(p/q) == Power[a^p, q^-1] to return True?

QUESTION FROM: Andrew Meit | 3 years ago BY: Jim Baldwin
Mathematics , Wolfram Language
22
REPLIES
7K
VIEWS

Generate points with density following Gaussian distribution

QUESTION FROM: S G | 4 years ago BY: S G
Mathematics , Statistics and Probability , Wolfram Language
22
REPLIES
12.2K
VIEWS

Get the Dot product of two vectors with complex components?

QUESTION FROM: David Mackay | 3 years ago BY: Hans Milton
Algebra , Mathematics , Symbolic Computations , Wolfram Language
21
REPLIES
33K
VIEWS

Calculate this Limit?

QUESTION FROM: Valeriu Ungureanu | 9 years ago BY: Gianluca Gorni
Calculus , Graphics and Visualization , Mathematics , ...
21
REPLIES
7K
VIEWS

Accurately solving an ode/bvp?

QUESTION FROM: Leslaw Bieniasz | 9 years ago BY: Marco Thiel
Calculus , Equation Solving , Mathematics , Wolfram Language
21
REPLIES
6.2K
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
6.5K
VIEWS

Determine inverse Laplace transforms of these expressions?

QUESTION FROM: Leslaw Bieniasz | 3 years ago BY: Leslaw Bieniasz
Calculus , Mathematics , Wolfram Language
20
REPLIES
11.4K
VIEWS

Automatically calculate equation's discriminant and Veda？

QUESTION FROM: Lee Tao | 4 years ago BY: Lee Tao
Algebra , Mathematics , Wolfram Language
20
REPLIES
6.9K
VIEWS

Add each number in the sequence to one value

QUESTION FROM: Sergey Scorin | 4 years ago BY: Sergey Scorin
Mathematics , Wolfram Language
20
REPLIES
5.8K
VIEWS

Calculate a Sum with fractional iterators (chemistry problem)

QUESTION FROM: Alberto Silva Ariano | 5 years ago BY: Hans Dolhaine
Chemistry , Mathematics , Wolfram Language
20
REPLIES
10.2K
VIEWS

Solve a system of differential equations?

QUESTION FROM: Torebek Zhumabek | 6 years ago BY: Hans Dolhaine
Calculus , Equation Solving , Mathematics , Wolfram Language
20
REPLIES
8.4K
VIEWS

Closed spline going through points

QUESTION FROM: Ed Pegg | 10 years ago BY: Michael Hale
Graphics and Visualization , Mathematica , Mathematics
20
REPLIES
21.7K
VIEWS

Fitting data to a square wave

QUESTION FROM: James Hall | 8 months ago BY: David Keith
Curated Data , Graphics and Visualization , Image Processing , ...
19
REPLIES
5.1K
VIEWS

A numerical integration high precision calculation problem

QUESTION FROM: HuaXing Ma | 1 year ago BY: Michael Rogers
Calculus , Mathematics , Numerical Computation , Wolfram Language
19
REPLIES
6.2K
VIEWS

Find these Transcendental equation's solution?

QUESTION FROM: Muhammad Afzal | 4 years ago BY: Sunanda Lakkimsetti
Algebra , Equation Solving , Mathematics , Numerical Computation , ...
19
REPLIES
11.8K
VIEWS

Use InterpolatingPolynomial with a lot of data?

QUESTION FROM: Jaime de la Mota | 6 years ago BY: Jaime de la Mota
Algebra , Control Systems , Data Science , Engineering , ...
19
REPLIES
9.5K
VIEWS

Modeling jump conditions in interphase mass transfer

QUESTION FROM: Tim Laska | 6 years ago BY: Anonymous User
Staff Picks , Calculus , Chemical Engineering , Chemistry , ...
19
REPLIES
38.8K
VIEWS

Re-evaluate a random generator to simulate a raquetball play?

QUESTION FROM: Raymond Low | 7 years ago BY: Ed Forrester
Mathematics , Modeling , Wolfram Language
19
REPLIES
13.9K
VIEWS

[?] Plot a Numerical Integration of (0.00159155/(x^2 + 0.000025^2))?

QUESTION FROM: Mujtaba Mozumder | 7 years ago BY: Mujtaba Mozumder
Graphics and Visualization , Mathematics , Numerical Computation , ...
19
REPLIES
7.4K
VIEWS

Unevaluated Sum of a sequence

QUESTION FROM: Ray Lawicki | 9 years ago BY: Gianluca Gorni
Mathematics , Wolfram Language
19
REPLIES
9.3K
VIEWS

How can I write this system of differential equations so MMA can solve it?

QUESTION FROM: c bro | 10 years ago BY: David Keith
Calculus , Equation Solving , Mathematics , Wolfram Language
19
REPLIES
15.1K
VIEWS

How do I model stem cell growth using loops?

QUESTION FROM: c bro | 10 years ago BY: David Keith
Biological Sciences , Computational Systems , Mathematics , ...
19
REPLIES
18.5K
VIEWS

KKT conditions for ellipse and hyperbolas for this app

QUESTION FROM: Radek Drozd | 11 years ago BY: Radek Drozd
Geometry , Graphics and Visualization , Mathematica , Optimization , ...
19
REPLIES
8.2K
VIEWS

Finding roots of multivariable function

QUESTION FROM: Byron Alexander | 1 year ago BY: Daniel Lichtblau
Calculus , Equation Solving , Mathematics , Wolfram Language
18
REPLIES
5.6K
VIEWS

[EIWL] Solving Example 6.10 of the Stephen Wolfram book

QUESTION FROM: D P | 2 years ago BY: Camille Driscoll
Education , Graphics and Visualization , Mathematics , ...
18
REPLIES
17.3K
VIEWS

Error with NDSolveValue: step size is effectively zero

QUESTION FROM: Amin bkh | 3 years ago BY: Amin bkh
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
18
REPLIES
5.7K
VIEWS

[WSC19] Use Machine Learning to Predict if Topography is Land or Ocean

QUESTION FROM: Khang Minh Nguyen | 6 years ago BY: Khang Minh Nguyen
Curated Data , Data Science , Earth Science , ...
18
REPLIES
35.3K
VIEWS

Get a pair with smallest total distance from one list

QUESTION FROM: Yode Japhe | 8 years ago BY: Yode Japhe
Computer Science , Data Science , Graphs and Networks , ...
18
REPLIES
17.9K
VIEWS

Eliminate produced redundant equations?

QUESTION FROM: Daniel Huber | 9 years ago BY: Daniel Huber
Algebra , Equation Solving , Mathematics , Symbolic Computations , ...
18
REPLIES
7.3K
VIEWS

System of 2 nonlinear equations: no result

QUESTION FROM: max ma | 10 years ago BY: Mariusz Iwaniuk
Equation Solving , Mathematics , Wolfram Language
18
REPLIES
4.8K
VIEWS

Find Fit for Nonlinear Data

QUESTION FROM: Alejandro Braun | 11 years ago BY: Udo Krause
Data Science , Mathematica , Mathematics , Wolfram Language
18
REPLIES
27.7K
VIEWS

Possible mistake in my Mathematica syntax for 4 springs and 3 masses

QUESTION FROM: Robert Jenkins | 11 years ago BY: Robert Jenkins
Mathematics , Physics , Wolfram Language
18
REPLIES
7.2K
VIEWS

Hodgkin-Huxley cable equation or propogation equation

QUESTION FROM: Jake Trexel | 12 years ago BY: Jake Trexel
Biological Sciences , Equation Solving , Mathematics , Physics , ...
18
REPLIES
27.7K
VIEWS

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

QUESTION FROM: Nithiya V | 1 year ago BY: Nithiya V
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
17
REPLIES
2.2K
VIEWS

Is there a way to view a graph of 2 functions in real time?

QUESTION FROM: Bobby Joe Snyder | 2 years ago BY: Rohit Namjoshi
Graphics and Visualization , Mathematics , Wolfram|Alpha , ...
17
REPLIES
7K
VIEWS

Calculate scalar H number divided by N vector?

QUESTION FROM: Meryem Aslı | 5 years ago BY: Hans Dolhaine
Algebra , Calculus , Equation Solving , Mathematics , ...
17
REPLIES
9.6K
VIEWS

[?] Create a list of different functions with different variables?

QUESTION FROM: Sami Suwailem | 5 years ago BY: Sami Suwailem
Economics , Mathematics , Symbolic Computations , Wolfram Language
17
REPLIES
7.7K
VIEWS

Applying Norm[ ] to the trig identity Sin^2 + Cos^2 = 1?

QUESTION FROM: Mitchell Sandlin | 6 years ago BY: do chris
Mathematics , Symbolic Computations , Wolfram Language
17
REPLIES
29.7K
VIEWS

Faster ways to solve symmetric top problem?

QUESTION FROM: Ox Clouding | 7 years ago BY: Ox Clouding
Calculus , Equation Solving , Mathematics , Modeling , ...
17
REPLIES
13.3K
VIEWS

Obtain the field intensity at a certain position of a maser interferometer?

QUESTION FROM: samira kettih | 7 years ago BY: Alexander Trounev
Graphics and Visualization , Mathematics , Numerical Computation , ...
17
REPLIES
6.3K
VIEWS

Solve a fraction when the denominator approaches zero?

QUESTION FROM: Luther Nayhm | 8 years ago BY: Anonymous User
Equation Solving , Mathematics , Wolfram Language
17
REPLIES
9.6K
VIEWS

Sort pairs that add up to a perfect square?

QUESTION FROM: Ashley Louk | 9 years ago BY: Sander Huisman
Discrete Mathematics , Mathematics , Symbolic Computations , ...
17
REPLIES
12.3K
VIEWS

Inverse Of Gamma Function?

QUESTION FROM: Mohamad Fard | 9 years ago BY: T.A. H.
Graphics and Visualization , Mathematics , Wolfram|Alpha , ...
17
REPLIES
18.3K
VIEWS

Create a function that replicates this series?

QUESTION FROM: Lea Rebanks | 9 years ago BY: Lea Rebanks
Equation Solving , Mathematics , Wolfram Language
17
REPLIES
12.1K
VIEWS

Calculate this limit with Wolfram|Alpha?

QUESTION FROM: Dvora Peretz | 9 years ago BY: Dvora Peretz
Mathematics , Wolfram|Alpha , Wolfram Language
17
REPLIES
12K
VIEWS

Construct a function from "Fourier" - data

QUESTION FROM: Hans Dolhaine | 10 years ago BY: Daniel Lichtblau
Mathematics , Signal Processing , Wolfram Language
17
REPLIES
19.2K
VIEWS

Having problems interpreting a Reduce answer can any one help

QUESTION FROM: Zachary Nichols | 10 years ago BY: Frank Kampas
Calculus , Mathematics , Physics , Wolfram Language
17
REPLIES
6.7K
VIEWS

Why doesn't Wolfram compute Ceiling[x] = 1 + Floor[x]?

QUESTION FROM: Sasha Mandra | 5 months ago BY: Michael Rogers
Algebra , Mathematics , Wolfram Language
16
REPLIES
1.9K
VIEWS

Traditional division of integers with remainder in Wolfram

QUESTION FROM: Sasha Mandra | 5 months ago BY: Eric Rimbey
Mathematics , Wolfram Language
16
REPLIES
1.6K
VIEWS

Write a ResourceFunction to improve LogitModelFit or get Wolfram to fix it?

QUESTION FROM: Seth Chandler | 3 years ago BY: Jim Baldwin
Machine Learning , Mathematica , Mathematics , ...
16
REPLIES
14.3K
VIEWS

Solving equation system with quadratic terms

QUESTION FROM: Maximilian Ulbrich | 5 years ago BY: Maximilian Ulbrich
Algebra , Equation Solving , Mathematics , Wolfram Language
16
REPLIES
8.2K
VIEWS

Wave Equation resolution with control

QUESTION FROM: Lina Lili | 5 years ago BY: Mariusz Iwaniuk
Control Systems , Equation Solving , Mathematica , Mathematics , ...
16
REPLIES
9.2K
VIEWS

Find better representations for binary variables optimization?

QUESTION FROM: Wael Al Hajailan | 6 years ago BY: Anonymous User
Optimization , Mathematics , Symbolic Computations , Wolfram Language
16
REPLIES
9.1K
VIEWS

Accurately calculate tick tock period of mechanical watches?

QUESTION FROM: Mor Bo | 6 years ago BY: Mor Bo
Audio, Sound and Music , Engineering , Graphics and Visualization , ...
16
REPLIES
17.5K
VIEWS

Solve the following delay differential equations?

QUESTION FROM: Rachele Allena | 7 years ago BY: Rachele Allena
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
16
REPLIES
6.3K
VIEWS

Use the LevenbergMarquardt method with FindFit?

QUESTION FROM: pantelidis | 7 years ago BY: pantelidis
Optimization , Mathematics , Physics , Wolfram Language
16
REPLIES
7.7K
VIEWS

[?] Plot in 3D a X-zylo ?

QUESTION FROM: Donghwan Roh | 8 years ago BY: Donghwan Roh
3D Printing , Graphics and Visualization , Mathematics , ...
16
REPLIES
12.9K
VIEWS

[?] Simplify the following expression until "s" is gone?

QUESTION FROM: Zhehao Zhang | 8 years ago BY: EDITORIAL BOARD
Algebra , Mathematics , Symbolic Computations , Wolfram Language
16
REPLIES
9.1K
VIEWS

Invert a function with Wolfram|Alpha?

QUESTION FROM: 12D S?n?f? | 9 years ago BY: Gianluca Gorni
Algebra , Mathematics , Wolfram|Alpha
16
REPLIES
14.1K
VIEWS

Numerical partial derivative of a function?

QUESTION FROM: Iuval Clejan | 9 years ago BY: Iuval Clejan
Calculus , Mathematics , Numerical Computation , Wolfram Language
16
REPLIES
9.3K
VIEWS

Test for the position of the first non-numeric value?

QUESTION FROM: Eduardo Mendes | 9 years ago BY: Eduardo Mendes
Algebra , Mathematics , Wolfram Language
16
REPLIES
7.8K
VIEWS

How to find the first 100 prime twins without a do loop or iteration

QUESTION FROM: H FR | 12 years ago BY: EDITORIAL BOARD
Mathematica , Mathematics
16
REPLIES
21.7K
VIEWS

Simplifying multiple inequalities

QUESTION FROM: Sasha Mandra | 1 year ago BY: Updating Name
Mathematics , Symbolic Computations , Wolfram Language
15
REPLIES
3.3K
VIEWS

Convert differential equation with substitutions?

QUESTION FROM: Sami Heidari | 1 year ago BY: Sami Heidari
Calculus , Equation Solving , Mathematics , Wolfram Language
15
REPLIES
3.6K
VIEWS

How to remove "Abs" from "Simplify" output?

QUESTION FROM: Zhenyu Zeng | 1 year ago BY: Zhenyu Zeng
Mathematics , Wolfram Language
15
REPLIES
5.7K
VIEWS

How to eliminate the divide by zero error in NDSolve by implicit methods on fixed grids?

QUESTION FROM: Leslaw Bieniasz | 1 year ago BY: Michael Rogers
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
15
REPLIES
4.8K
VIEWS

Question on the Laplace Inversion of a function using Mathematica

QUESTION FROM: Amir A. | 1 year ago BY: Amir A.
Calculus , Mathematics , Wolfram|Alpha , Wolfram Language
15
REPLIES
4.5K
VIEWS

Why does the memory used keep going up and no output is given?

QUESTION FROM: Iuval Clejan | 1 year ago BY: Iuval Clejan
Algebra , Equation Solving , Mathematics , Tuning and Debugging , ...
15
REPLIES
4K
VIEWS

Issue with numerical evaluation of eigenvalues

QUESTION FROM: Muhammad Zubair | 2 years ago BY: Rohit Namjoshi
Algebra , Graphics and Visualization , Mathematics , Physics , ...
15
REPLIES
4.4K
VIEWS

Overflow problem implementing Euler's method

QUESTION FROM: Athanasios Paraskevopoulos | 2 years ago BY: Athanasios Paraskevopoulos
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
15
REPLIES
3.9K
VIEWS

Solve error: not a valid variable

QUESTION FROM: J E | 3 years ago BY: J E
Algebra , Equation Solving , Mathematics , Wolfram Language
15
REPLIES
8.1K
VIEWS
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