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Oct
16
revised Need help understandig the output of `DSolve`
edited tags
Oct
16
comment Need help understandig the output of `DSolve`
It's probably artifact due to the lack of information about the integrability of 1/f^2
Oct
16
answered How to open *.sif files with Mathematica
Oct
16
revised Swap LHS's (or equivalently RHS's) of two rules in a list
added 76 characters in body
Oct
16
answered Swap LHS's (or equivalently RHS's) of two rules in a list
Oct
16
comment How can I handle interface thermal boundary conditions?
Welcome to Mathematica.SE! I suggest the following: 0) Browse the common pitfalls question 1) As you receive help, try to give it too, by answering questions in your area of expertise. 2) Read the faq! 3) When you see good questions and answers, vote them up by clicking the gray triangles, because the credibility of the system is based on the reputation gained by users sharing their knowledge. Also, please remember to accept the answer, if any, that solves your problem, by clicking the checkmark sign!
Oct
16
comment How could I perform this replacement?
Please beware that Times is Orderless, so your expression could get reordered automagically
Oct
16
comment Swap LHS's (or equivalently RHS's) of two rules in a list
Can't check right now, but it looks OK. +1
Oct
16
comment Swap LHS's (or equivalently RHS's) of two rules in a list
swapRulesA[{a -> b, c -> a, b -> c}, 1, 2]
Oct
16
comment Swap LHS's (or equivalently RHS's) of two rules in a list
The order of application alters the result, so swapping the LHS is not always equivalent to swap the RHS
Oct
15
comment How could I perform this replacement?
@march katlas.org/wiki/Setup
Oct
15
revised evaluation of the sum of KroneckerDelta
added 1 character in body
Oct
15
comment How could I perform this replacement?
Quite a strange requirement. Do you mind explaining why do you want to do this ? Perhaps there is a more standard way ...
Oct
15
answered Solving a system of vector equations
Oct
15
comment Solving a system of vector equations
What kind of beasts are your conc[ ] supposed to be?Lists? Reals?
Oct
15
comment Find Values of a and b for a Limit
From f[x_] := (Sin[a*x] + (b*x))/x^3, Series[f@x, {x, 0, 3}] you may see that b == -a
Oct
15
comment Find Values of a and b for a Limit
f[x_] := (Sin[a*x] - (a*x))/x^3; Limit[f[x], x -> 0]
Oct
15
comment Creating a random complex univariate polynomial
See for example RandomVariate, Dot and Array or FromCoefficientRules
Oct
15
comment Plot3D is incorrectly returning “1/0. encountered”
Not just there ... Reap@Plot3D[(Sow[{x, y}]; 1/y), {x, 0, 1}, {y, x + 1, x + 2}]
Oct
15
comment Eigenvalues of a large matrix
Related mathematica.stackexchange.com/a/88349/193