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9h
comment Numerical evaluation of a sum
@Wouter, but, as you know, this procedure is not always the best way to proceed (e.g. the classical alternating series for $\log 2$).
10h
comment Numerical evaluation of a sum
One should always strive to exploit the structure of a problem whenever possible. In this case, since it is apparent that the sum to be evaluated is alternating, you should definitely be using the "AlternatingSigns" method.
11h
comment Pattern for a function of say 2 variables
And why is g[x, y] for undefined g not admissible?
11h
comment Pattern for a function of say 2 variables
Why? You want the result of F to be a list of numbers?
1d
comment How to convert this .txt data into a list of points
Why are you doing ImportString[] after Import[]? Try importing it as "CSV" instead.
1d
comment Solving general system of equations
Do you know how to reformulate your problem into matrix form?
1d
comment How do I get the inverse of a homogeneous transformation matrix?
How I'd have done it: homogeneousTransformationInverse[mat_?SquareMatrixQ] /; Length[mat] == 4 := With[{rot = Take[mat, 3, 3]}, Transpose[ArrayFlatten[{{rot, 0}, {{-mat[[;; -2, -1]].rot}, 1}}]]]. Of course, if the appropriate part of the matrix is not orthogonal, Inverse[]/LinearSolve[] would be used instead.
1d
comment Mathematica Can Find the Primitive Function But It Cannot Find the Closed Form for Corresponding Definite Integral
Mathematica does not really do to well with cleanly evaluating elliptic integrals; some amount of analytical hand-holding can be needed.
1d
comment How to replicate v9's color conversion to LAB under v10
You accounted for chromatic adaptation in this case, yes?
1d
comment What is the imperative (or pseudo) code for this mathematica code?
How about adding context; that is, the application in which you'll be using this?
2d
comment Reproducing Mathematica's Nullspace basis within c++
...but then, C++ does not support exact numbers like Sqrt[2], so what do you actually want to do?
2d
comment Reproducing Mathematica's Nullspace basis within c++
...but you are aware that NullSpace[] does use SVD if given a matrix of inexact numbers, yes?
2d
comment How do I plot a space curve as a ribbon?
"undefined function" - I did link to the generalized tube routines in my other answer, tho. ;)
2d
comment Solving general system of equations
Where exactly did your system of equations come from? Are they algebraic or transcendental?
2d
comment Why does Mathematica report that $\int_1^\infty\frac{\sin(\sqrt{x})}{\sqrt{x}}dx$ = $2\cos(1)$?
Oleksandr's comment says that 5.2 is okay. Can somebody with versions later than 5.2 and earlier than 10 check if this behavior is seen before I add the bugs tag back?
2d
comment Issue with replacement rules screwing up a matrix
That should probably be Inverse[A].f, but in practice, LinearSolve[A, f] is the preferred route.
2d
comment NDSolve: Indeterminate expression 0. ComplexInfinity encountered?
…and without context of any sort, why should other people be interested in this?
2d
comment Why does Mathematica report that $\int_1^\infty\frac{\sin(\sqrt{x})}{\sqrt{x}}dx$ = $2\cos(1)$?
@Vadim, my second comment hints on how to show this, you see… ;)
2d
comment Reproduce image effect in Mathematica
Have you seen this?
2d
comment Why does Mathematica report that $\int_1^\infty\frac{\sin(\sqrt{x})}{\sqrt{x}}dx$ = $2\cos(1)$?
(Although, making the substitution $x=u^2$ does reveal the trouble.)