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Classical and quantum mechanics, electricity and magnetism, thermodynamics, high-energy and particle physics, condensed matter physics, biophysics.... Astronomy and optics are separate categories.

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Create a color gradient using a variable?

QUESTION FROM: John Wick | 5 years ago BY: Hans Dolhaine
Graphics and Visualization , Physics , Wolfram Language
39
REPLIES
17.7K
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
17.3K
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
14.8K
VIEWS

Why are some professors negative on Mathematica?

QUESTION FROM: Luther Nayhm | 10 years ago BY: David J M Park Jr
Calculus , Mathematica , Physics , Wolfram Language
31
REPLIES
35.3K
VIEWS

Modeling a Trebuchet

QUESTION FROM: Varun Kulkarni | 9 years ago BY: Frederick Wu
Modeling , Numerical Computation , Physics , Wolfram Language
28
REPLIES
34.8K
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
9.5K
VIEWS

Looking for a function to norm a Polar Plot

QUESTION FROM: Peter Parker | 12 years ago BY: Youngjoo Chung
Audio, Sound and Music , Mathematica , Physics
23
REPLIES
11.4K
VIEWS

Fitting data to a square wave

QUESTION FROM: James Hall | 7 months ago BY: David Keith
Curated Data , Graphics and Visualization , Image Processing , ...
19
REPLIES
4.9K
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
38.6K
VIEWS

How to solve a system of Non-linear equations

QUESTION FROM: Marcelo De Cicco | 11 years ago BY: Marcelo De Cicco
Mathematica , Physics
19
REPLIES
16.6K
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
27.5K
VIEWS

Working with lists - comparing data in lists of unequal length.

QUESTION FROM: David Kirkby | 6 years ago BY: M.A. Ghorbani
Data Science , Engineering , Modeling , Physics , ...
17
REPLIES
15.1K
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

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
6.6K
VIEWS

Solve the Nonlinear Schroedinger Equation with NDSolve?

QUESTION FROM: Markus Schmidt | 7 years ago BY: Markus Schmidt
Equation Solving , Mathematica , Modeling , Numerical Computation , ...
16
REPLIES
18.8K
VIEWS

Use the LevenbergMarquardt method with FindFit?

QUESTION FROM: pantelidis | 7 years ago BY: pantelidis
Optimization , Mathematics , Physics , Wolfram Language
16
REPLIES
7.6K
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
4.3K
VIEWS

Notation of Wolfram quantum computation framework

QUESTION FROM: Doug Beveridge | 4 years ago BY: EDITORIAL BOARD
High-Performance Computing , Packages , Physics , Wolfram Language
15
REPLIES
9.9K
VIEWS

Define functions for variables with units?

QUESTION FROM: Orest Gogosha | 7 years ago BY: Ian Williams
Mathematics , Physics , Units , Wolfram Language
15
REPLIES
16.9K
VIEWS

Solve the Laplace equation of a circular loop using NDSolveValue ?

QUESTION FROM: Alvaro Martínez | 7 years ago BY: Alvaro Martínez
Equation Solving , Mathematics , Numerical Computation , Physics , ...
15
REPLIES
7.7K
VIEWS

Fourier Series of function defined with conditional statement

QUESTION FROM: Kaushik Mallick | 10 years ago BY: Kaushik Mallick
Calculus , Mathematica , Mathematics , Mechanical Engineering , ...
15
REPLIES
16.5K
VIEWS

Save the interpolation function that is a result of NDsolve?

QUESTION FROM: Markus Schmidt | 5 years ago BY: Tony Coliderse
Calculus , Equation Solving , Mathematics , Modeling , ...
14
REPLIES
21K
VIEWS

Solve nonlinear complex numerical differential equations

QUESTION FROM: C. H. | 5 years ago BY: Anonymous User
Equation Solving , Mathematics , Numerical Computation , Physics , ...
14
REPLIES
7.6K
VIEWS

Solve 2 coupled 2nd ODEs and plot them with ParametricPlot?

QUESTION FROM: Soumen Basak | 6 years ago BY: Soumen Basak
Calculus , Computational Systems , Equation Solving , ...
14
REPLIES
14.1K
VIEWS

resolution of an equation

QUESTION FROM: abddellatif loua | 9 years ago BY: abddellatif loua
Calculus , Equation Solving , Group Theory , Optimization , ...
14
REPLIES
21.9K
VIEWS

Animate quantum wave plot

QUESTION FROM: Max Fischer | 11 years ago BY: Humberto Munoz Bauza
Calculus , Graphics and Visualization , Mathematica , Physics
14
REPLIES
17.7K
VIEWS

FindMinimum code working on V9 but not V14

QUESTION FROM: Hirokazu Maruyama | 10 months ago BY: Hirokazu Maruyama
Calculus , Optimization , Mathematics , Physics , Wolfram Language
13
REPLIES
3K
VIEWS

Generate weighted random numbers

QUESTION FROM: Michael Knoerzer | 2 years ago BY: Jari Kirma
Data Science , Mathematica , Mathematics , Physics , ...
13
REPLIES
15.7K
VIEWS

Representation of the updates in Wolfram Model by linear operators

QUESTION FROM: Pavlo Bulanchuk | 5 years ago BY: José Manuel Rodríguez Caballero
Graphs and Networks , Physics , Wolfram Fundamental Physics Project , ...
13
REPLIES
10.3K
VIEWS

Simulate the motion of the Earth around the Sun based on Kepler's Law?

QUESTION FROM: Senlau Minto | 7 years ago BY: Senlau Minto
Astronomy , Equation Solving , Mathematics , Modeling , Physics , ...
13
REPLIES
14.5K
VIEWS

Integration involving vectors?

QUESTION FROM: Arny Toynbee | 8 years ago BY: Arny Toynbee
Calculus , Mathematics , Numerical Computation , Physics , ...
13
REPLIES
12.1K
VIEWS

Distance between 2 flat molecules

QUESTION FROM: A Y | 11 years ago BY: Mohammad Khan
Chemistry , Geometry , Mathematica , Mathematics , Physics , ...
13
REPLIES
22.2K
VIEWS

Density / Schwarschild radius

QUESTION FROM: richard bowen | 11 years ago BY: richard bowen
Mathematics , Physics
13
REPLIES
2.8K
VIEWS

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

QUESTION FROM: Cameron Turner | 1 year ago BY: Cameron Turner
Calculus , Equation Solving , Finance , Mathematics , ...
12
REPLIES
3.1K
VIEWS

Quantum random walk in Wolfram Model

QUESTION FROM: Pavlo Bulanchuk | 5 years ago BY: Pavlo Bulanchuk
Physics , Wolfram Fundamental Physics Project , Wolfram Language , ...
12
REPLIES
9.9K
VIEWS

[Solved] Making a function from data by interpolation

QUESTION FROM: Davood Rafiei | 5 years ago BY: Davood Rafiei
Astronomy , Mathematica , Physics , Wolfram Language
12
REPLIES
9.4K
VIEWS

Mathematica kernel crashing after repeated use of NMinimize

QUESTION FROM: Helena Kolesova | 6 years ago BY: Shenghui Yang
Computer Science , Data Science , Mathematics , Physics
12
REPLIES
9.8K
VIEWS

Solve equation of motion with Dirac-fermions?

QUESTION FROM: C. H. | 7 years ago BY: C. H.
Calculus , Equation Solving , Mathematics , Packages , Physics , ...
12
REPLIES
7.1K
VIEWS

Switch between two flanges while using the MultiBody library in SM?

QUESTION FROM: JOSE OLIVER | 8 years ago BY: Neil Singer
Modeling , Physics , SystemModeler
12
REPLIES
10.2K
VIEWS

Atom types created by Mathematica not read by other programs

QUESTION FROM: Eft Rsd | 9 years ago BY: Eft Rsd
Chemistry , Curated Data , External Programs and Systems , ...
12
REPLIES
11.5K
VIEWS

Some hard numerical integrations Specific example provided

QUESTION FROM: Stven Maths | 10 years ago BY: Updating Name
Calculus , Mathematics , Physics
12
REPLIES
8.3K
VIEWS

Fundamental question about symbolic capabilities of Wolfram Language

QUESTION FROM: Atriya Sen | 10 years ago BY: Atriya Sen
Mathematics , Physics , Symbolic Computations , Wolfram Language
12
REPLIES
10.4K
VIEWS

Finding a specific solution to an ODE system

QUESTION FROM: Mike Jones | 10 years ago BY: Mike Jones
Mathematica , Mathematics , Physics , Wolfram Language
12
REPLIES
8.7K
VIEWS

Simulating mechanics of a cylinder rolling on a parabola

QUESTION FROM: Jef Barthe | 12 years ago BY: Erik Mahieu
Engineering , Mathematica , Physics , SystemModeler
12
REPLIES
39.3K
VIEWS

Optimal lighting configuration of 5 lamps in a square room

QUESTION FROM: Todd Rowland | 12 years ago BY: Todd Rowland
Architecture , Challenges , Engineering , Mathematics , Optics , ...
12
REPLIES
43.3K
VIEWS

Can Wolfram's new compiler technology speed up this AABB tree code?

QUESTION FROM: Greg Hurst | 2 years ago BY: Greg Hurst
Compilation , Geometry , High-Performance Computing , Physics , ...
11
REPLIES
5.4K
VIEWS

Philosophy of Time

QUESTION FROM: Barry Silverman | 2 years ago BY: Jarek Duda
Physics , Wolfram Fundamental Physics Project , Wolfram Science
11
REPLIES
19.5K
VIEWS

System overdetermined

QUESTION FROM: Yesenia Tapia | 5 years ago BY: Hans Dolhaine
Equation Solving , Mathematics , Numerical Computation , Physics , ...
11
REPLIES
5K
VIEWS

Obtain Prony Coefficients from the following data?

QUESTION FROM: Justin Hendrix | 7 years ago BY: Daniel Lichtblau
Data Science , Optimization , Mathematics , Physics , ...
11
REPLIES
7.6K
VIEWS

Solve with ConditionalExpression at boundary?

QUESTION FROM: Mikael Hakman | 9 years ago BY: Mikael Hakman
Equation Solving , Mathematics , Physics , Symbolic Computations , ...
11
REPLIES
6K
VIEWS

ComplexExpand[Re[Expr]] does not seem to work.

QUESTION FROM: Tigran Aivazian | 10 years ago BY: Tigran Aivazian
Mathematica , Physics
11
REPLIES
9.3K
VIEWS

Need serious help with lists!

QUESTION FROM: Nathan Lundholm | 10 years ago BY: Nathan Lundholm
Aerospace Engineering , Astronomy , Computer Science , ...
11
REPLIES
12.2K
VIEWS

Lifetime of muon decay frequencies histogram plot

QUESTION FROM: Mustafa Ibrahim | 10 years ago BY: EDITORIAL BOARD
Data Science , Graphics and Visualization , Physics , Wolfram Language
11
REPLIES
9.7K
VIEWS

The Fine-Structure Constant Challenge

QUESTION FROM: José Manuel Rodríguez Caballero | 1 year ago BY: Jeff Yates
Physics , Wolfram Fundamental Physics Project , Wolfram Language , ...
10
REPLIES
10.2K
VIEWS

Create spacegroups with Wolfram language?

QUESTION FROM: Hongyi Zhao | 3 years ago BY: Hongyi Zhao
Group Theory , Physics , Wolfram Language
10
REPLIES
3.9K
VIEWS

Where are notebooks for "Classical Mechanics with Mathematica", 2nd ed?

QUESTION FROM: Murray Eisenberg | 4 years ago BY: Raspi Rascal
Authoring and Publishing , Mathematica , Mathematics , Physics , ...
10
REPLIES
18.7K
VIEWS

Intensity of light in double slit experiment?

QUESTION FROM: Wonseok Lee | 5 years ago BY: Henrik Schachner
Dynamic Interactivity , Graphics and Visualization , Optics , ...
10
REPLIES
6.7K
VIEWS

Radians as Dimensionless Unit?

QUESTION FROM: Eric Hudson | 6 years ago BY: Francisco Rodríguez
Physics , Units , Wolfram Language
10
REPLIES
19.4K
VIEWS

I want to how to...

QUESTION FROM: Ayan Mukhopadhyay | 6 years ago BY: Daniel Lichtblau
Physics
10
REPLIES
6.2K
VIEWS

List all build-in physical constants in Mathematica 11.3?

QUESTION FROM: Sascha Tayefeh | 6 years ago BY: Sascha Tayefeh
Curated Data , Mathematica , Physics , Wolfram Language
10
REPLIES
17.1K
VIEWS

Model the Coffee cooling problem with WSM?

QUESTION FROM: Gary Bass | 8 years ago BY: Gary Bass
Education , Modeling , Physics , SystemModeler
10
REPLIES
21.2K
VIEWS

Solve the following equation with NSolve?

QUESTION FROM: Sreeraj T | 9 years ago BY: Sreeraj T
Equation Solving , Mathematics , Numerical Computation , Physics , ...
10
REPLIES
11.1K
VIEWS

Interactive Physics simulation software with Wolfram Language?

QUESTION FROM: Ch' Prof | 9 years ago BY: W. Craig Carter
Computer-Based Maths , Dynamic Interactivity , Education , Physics , ...
10
REPLIES
16.7K
VIEWS

Solution of a quite long differential equation (Lagrange Equation)

QUESTION FROM: Thimo Merkel | 9 years ago BY: Thimo Merkel
Equation Solving , Mathematics , Physics , Symbolic Computations , ...
10
REPLIES
4.7K
VIEWS

PDF File to ListPlot?

QUESTION FROM: Dean Sparrow | 10 years ago BY: Dean Sparrow
Physics
10
REPLIES
9.1K
VIEWS

Problem with distinguishing terms in Sum

QUESTION FROM: dinesh kumar | 10 years ago BY: Gianluca Gorni
Physics
10
REPLIES
4.4K
VIEWS

My program has been running for two days. Is this normal?

QUESTION FROM: Hui Sun | 10 years ago BY: Hui Sun
Aerospace Engineering , Mathematics , Mechanical Engineering , Physics
10
REPLIES
28.2K
VIEWS

Mathematica for General Relativity and Gravity research

QUESTION FROM: Boris Latosh | 11 years ago BY: Frank Kampas
Astronomy , Mathematica , Mathematics , Physics , Wolfram Language
10
REPLIES
33.6K
VIEWS

Random Walk

QUESTION FROM: Sandra Deckel | 11 years ago BY: Richard Gaylord
Mathematica , Physics , Wolfram Language
10
REPLIES
7.7K
VIEWS

How to plot {x,y,z,i} data?

QUESTION FROM: Anna Regoutz | 12 years ago BY: Darya Aleinikava
Chemistry , Graphics and Visualization , Mathematica , Physics
10
REPLIES
23.6K
VIEWS

How can I do the derivative of a Hankel function with respect to complex order (nu)?

QUESTION FROM: scintific1 math | 2 months ago BY: scintific1 math
Calculus , Mathematics , Physics , Wolfram Language
9
REPLIES
827
VIEWS

How can I best mimic Fortran Double Precision in MMA ?

QUESTION FROM: David Mackay | 2 years ago BY: David Mackay
Numerical Computation , Physics , Wolfram Language
9
REPLIES
4.5K
VIEWS

HankelH1 real part for large values of n differs from Python result

QUESTION FROM: D D | 4 years ago BY: D D
Algebra , Astronomy , Computer Science , Data Science , Economics , ...
9
REPLIES
7.2K
VIEWS

Causal invariance definition issue

QUESTION FROM: Pavlo Bulanchuk | 5 years ago BY: José Manuel Rodríguez Caballero
Physics , Wolfram Fundamental Physics Project , Wolfram Language , ...
9
REPLIES
8.8K
VIEWS

Question about a quoted expression: {x,y} matches {x,x} ?

QUESTION FROM: David Stephenson | 5 years ago BY: Ruggero Valli
Graphs and Networks , Physics , Wolfram Fundamental Physics Project , ...
9
REPLIES
6.7K
VIEWS

Arrows between events in causal graphs that skip over other events

QUESTION FROM: Joseph Musser | 5 years ago BY: Joseph Musser
Physics , Wolfram Fundamental Physics Project , Wolfram Language , ...
9
REPLIES
6.7K
VIEWS

Where would magnetism fit in this model?

QUESTION FROM: Cristóbal Camarero | 5 years ago BY: Detlef Hoyer
Physics , Wolfram Fundamental Physics Project , Wolfram Science
9
REPLIES
9.4K
VIEWS

ErrorBarLogPlots

QUESTION FROM: Elham Jamshidi | 5 years ago BY: Elham Jamshidi
Data Science , Graphics and Visualization , Packages , Physics , ...
9
REPLIES
4.8K
VIEWS

Convert time vs accelerometer data to plot a random vibration PSD plot?

QUESTION FROM: Delan Chen | 6 years ago BY: Delan Chen
Data Science , Engineering , Graphics and Visualization , ...
9
REPLIES
12.9K
VIEWS

Solve a coupled second order differential equations of two variables?

QUESTION FROM: Shivi Sv | 7 years ago BY: Shivi Sv
Calculus , Equation Solving , Mathematics , Physics , Wolfram Language
9
REPLIES
10.4K
VIEWS

Solve trigonometric equation system?

QUESTION FROM: Enrico Catanzani | 7 years ago BY: Enrico Catanzani
Equation Solving , Mathematics , Physics , Wolfram Language
9
REPLIES
4.5K
VIEWS

How to use the Wolfram|Alpha time dilation calculator on Black Holes?

QUESTION FROM: Jack M | 7 years ago BY: Joseph Wiese
Astronomy , Mathematics , Physics , Wolfram|Alpha
9
REPLIES
28.9K
VIEWS

[?] Solve and Plot a 2D heat conduction problem (laser heating)?

QUESTION FROM: Xing Zhang | 8 years ago BY: Xing Zhang
Engineering , Equation Solving , Graphics and Visualization , ...
9
REPLIES
10.3K
VIEWS

Determine intensity for each pixel in an image by digitizing/binning it?

QUESTION FROM: Maurice Stancil | 9 years ago BY: EDITORIAL BOARD
Engineering , Image Processing , Optics , Physics , Wolfram Language
9
REPLIES
16.8K
VIEWS

Modeling a brick subjected to gravity with SystemModeler?

QUESTION FROM: Ch' Prof | 9 years ago BY: Ch' Prof
Modeling , Physics , SystemModeler
9
REPLIES
9.9K
VIEWS

How to use SphericalPlot3D?

QUESTION FROM: Mikael Hakman | 9 years ago BY: Mikael Hakman
Graphics and Visualization , Physics , Wolfram Language
9
REPLIES
9.5K
VIEWS

Impact of a ball against a wall

QUESTION FROM: Varun Kulkarni | 10 years ago BY: Varun Kulkarni
Graphics and Visualization , Physics , Wolfram Language
9
REPLIES
11.1K
VIEWS

Solve a nonlinear equation

QUESTION FROM: Minh-Ngoc Vu | 10 years ago BY: Frank Kampas
Aerospace Engineering , Computer Science , Mathematica , ...
9
REPLIES
12.2K
VIEWS

How can I plot the luminosity distance as function of redshift?

QUESTION FROM: Matteo De Leone | 10 years ago BY: Gianluca Gorni
Astronomy , Graphics and Visualization , Physics , Wolfram Language
9
REPLIES
12.5K
VIEWS

Where I can find the code for Volterra Integral Equation of the Second Kind

QUESTION FROM: jabir Hakami | 10 years ago BY: jabir Hakami
Engineering , Mathematics , Physics , Wolfram Language
9
REPLIES
14.3K
VIEWS

How can I correct the following code to produce the expected result?

QUESTION FROM: Xu Xu | 5 months ago BY: Xu Xu
Algebra , Equation Solving , Mathematics , Physics , ...
8
REPLIES
1.9K
VIEWS

Simplify sums with Kronecker deltas?

QUESTION FROM: Guillaume Laporte | 1 year ago BY: Marco Francischello
Mathematics , Physics , Symbolic Computations , Wolfram Language
8
REPLIES
9.4K
VIEWS

Improving accuracy of neural network for determining qubit rotation angle

QUESTION FROM: Byron Alexander | 1 year ago BY: Byron Alexander
Data Science , Neural Networks , Physics , Wolfram Language
8
REPLIES
3.8K
VIEWS

How to find physical quantities with the most dimensions

QUESTION FROM: Peter Burbery | 3 years ago BY: Peter Burbery
Curated Data , Mathematica , Mathematics , Physics , Units
8
REPLIES
4.4K
VIEWS

Misunderstanding section 2.7 of Wolfram physics project?

QUESTION FROM: Zephyr Penoyre | 4 years ago BY: Kirk Boyer
Graphs and Networks , Physics , Wolfram Fundamental Physics Project , ...
8
REPLIES
8.2K
VIEWS

Using NBodySimulation with a custom pairwise function?

QUESTION FROM: Madeleine Sutherland | 4 years ago BY: Hans Dolhaine
Chemistry , Physics , Wolfram Language
8
REPLIES
6.7K
VIEWS

I'm having problems with third type heat transfer boundary condition

QUESTION FROM: Y L | 4 years ago BY: Y L
Equation Solving , Mathematics , Numerical Computation , Physics , ...
8
REPLIES
4.6K
VIEWS

Several questions, but mostly what are nodes?

QUESTION FROM: Michael Leza | 5 years ago BY: Carl Lundgren
Graphs and Networks , Physics , Wolfram Fundamental Physics Project , ...
8
REPLIES
10.3K
VIEWS
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