NSolve uses all CPU resources
Solving a matrix differential equation with change of variable
How to make conditions work in Which?
Why does DiagonalizableMatrixQ give different answers when Simplify or FullSimplify is applied to a 4x4 matrix, consisting of complex trig. functions?
Solve cannot find solutions if integer parameters are assumed
Transform a list of rules into a list of function definitions
Sum[] function not computing the sum
NSolve uses all CPU resources https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=306871
Is it default setting of NSolve that it uses all my four cores of CPU? Be aware that the following code made my computer non-respondent for about 18 seconds till it ... [equation-solving] [performance-tuning] [numerics] [system-performance]
asked by azerbajdzan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53172 Score of
7 answered by Daniel Lichtblau https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=51
Score of 8 Solving a matrix differential equation with change of variable https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=306886
In order to solve $\partial_t X(t) = -i(M X(t) - X(t) M^*)$ (where * is conjugate-transpose), I wrote the following code: ... [differential-equations] [equation-solving] [matrix]
asked by phy_std https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=98622
Score of 4 How to make conditions work in Which? https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=306859
How to make Condition convert to common expresstions when it mathes Which test. ... [condition]
asked by eason https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=73017 Score of
4 answered by Domen https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=75628
Score of 5 Why does DiagonalizableMatrixQ give different answers when Simplify or FullSimplify is applied to a 4x4 matrix, consisting of complex trig. functions?
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=306761
NOTE: I HAVE CLEANED UP THIS DISCUSSION TO MAKE THINGS MORE TRANSPARENT: I am using Mathematica version 12.1. I have a 4x4 matrix called matrixA[x, y] , which ... [matrix] [bugs]
asked by Quantum Kid https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=95345
Score of 4 Solve cannot find solutions if integer parameters are assumed https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=306742
This is a very simple toy problem that illustrates the problem. Start with a fresh kernel. Quit[] Make some simple assumptions ... [equation-solving] [special-functions]
asked by Bill Watts https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53121 Score
of 4 answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999
Score of 3 Transform a list of rules into a list of function definitions https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=306745
I have a list of rules obtained by solving a system of equations, e.g. {f[x] -> a + 3 h[x], g[x] -> 2 a + c + 6 h[x]} . I wish to convert this list of rules ... [functions] [replacement] [assignment]
asked by Stanislas Antczak https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=101570 Score
of 4 answered by Craig Carter https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12461
Score of 5 Sum[] function not computing the sum https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=306763
I have the following sum: $$\sum _{y=0}^x \left(1-n^2! \left(n^2\right)^{-y} \mathcal{S}_y^{\left(n^2\right)}\right)$$ Which, in Wolfram language can be written as: ... [calculus-and-analysis]
asked by Cardstdani https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=98456 Score of
4 answered by azerbajdzan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53172
Score of 8