1,521 reputation
513
bio website math.upatras.gr/~spawn
location Brazil
age 37
visits member for 2 years, 10 months
seen Oct 2 at 22:21

Mathematics, PDEs, General Relativity and symbolic programming with Mathematica.


Sep
30
awarded  Explainer
Jan
26
awarded  Yearling
Jul
4
comment MathLink and a function of a real variable
You can "overload" your function like MyFunction[x_Integer]:=MyFunction[N[x]].
Jun
26
comment sequence of matrix multiplications
Lookup Nest and friends.
Jun
25
comment How can I randomize order of elements in a list?
@belisarius no just to edit the typo ...
Jun
25
comment How can I randomize order of elements in a list?
Use RandomSample.
Jun
11
awarded  Enlightened
Jun
11
awarded  Nice Answer
Jun
9
comment Memory handling by ConstantArray
Probably the array was initially packed because it had only one type of data and when another type was introduced was unpacked. Try adding 1. instead of 1 and see what happens.
Jun
8
comment Plotting equipotentials gone wrong
I think you should manipulate it mathematically a bit further.
Jun
8
revised Plotting equipotentials gone wrong
improved formatting
Jun
8
suggested suggested edit on Plotting equipotentials gone wrong
Jun
7
comment What is the fastest way to maintain a large set of expressions?
Try linked lists.
Jun
7
comment Accurately evaluating the hypergeometric function
Try this Block[{$MaxExtraPrecision = 100}, N[Hypergeometric2F1[1, 1, 200, -1], 17]]
Jun
6
comment How to decompose a complex expression containing repeated subexpressions?
FullSimplify looks like it does a better job.
Jun
5
comment How to check an algebraic number for membership in a list
PossibleZeroQ might be of some help.
Jun
5
comment Select elements in a list when the firsts two items are the same (no matter order) and its third element is lower
@user7892 If you mean the Complement[Most[#1], Most[#2]] === {} part, it's just a way using basic principles from set theory for gathering the same edges.
Jun
5
answered Select elements in a list when the firsts two items are the same (no matter order) and its third element is lower
Jun
1
awarded  Enlightened
May
23
comment How can I shade specific regions between two curves in a Plot?
You can try combining this Plot with a RegionPlot using Show.