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I am doing vector analysis. I have figured out that the following expression won't be simplified in Mathematica:Simplify[Dot[x, y] - Dot[y, x]]I think the reason is that x and...
Asked on 02/22/2021
4 answerI don't understand why I get the following output: when in fact I was expecting to get $Failed, 1 or...
Asked on 02/22/2021 by joka
3 answerI have a long list consists of float numbers with some of them duplicated as shown below. I want to divide this...
Asked on 02/22/2021 by kosif
2 answerA fun combinatoric puzzle that's popped up in my work that I think would be cute to have a Mathematica solution to, if anyone wants to give it a go....
Asked on 02/21/2021
4 answerMy symbolic matrix $A$ reads begin{equation*}left(begin{array}{ccc} a left(x^2+y^2+z^2right) & b y z+i v x & -i v y \ b y z-i v x...
Asked on 02/21/2021 by Shasa
1 answerI'd like to find the best fit coefficients "a" and "c" for a toroidal surface, to a list of {x,y,z} points which are approximately on the surface of the torus....
Asked on 02/21/2021
2 answerI have a code that gives me the Christoffel symbols of a metric. How do I take the covariant derivative of a vector? It does not necessarily have to build...
Asked on 02/21/2021 by John Greger
1 answerI have a process that as part of it requires a certain probability query, specifically, given a multinomial distribution with f equiprobable categories and r trials, some specific category has...
Asked on 02/21/2021 by ciao
1 answerI have a multivariable polynomial, for instance: $P=yx+2^4xy+3+5^2xz+3^4zx $ I would like to do the following:extract those terms that only have $z$extract terms that only have $y$express...
Asked on 02/21/2021
1 answerI want to simplify the following patternCases[Permutations[Range@3], {___, 2, 3, ___} | {___, 3, 2, ___}]into something like (but it does not compile).Cases[Permutations[Range@3], {___, (2, 3) | (3,...
Asked on 02/21/2021 by Money Oriented Programmer
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