J. M.

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Blocky depiction of Hilbert curve, styled with Perlin noise.

E-mail (flipped ROT13): zqd˙ʎʌuzʇ@ʇɐʌǝɥʇʌssqɹǝɥɟuɹʎɔ
Any code I've posted here I place under the WTFPL.

	27,065 reputation	bio	website	tpfto.wordpress.com	visits	member for	1 year, 4 months
658128 badges		location			seen	13 mins ago

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2m	answered	Why do these two different zetas produce the same value?
18m	revised	Why do these two different zetas produce the same value? edited tags
24m	comment	Range of stability for iterative map If your polynomial has numeric (as opposed to symbolic) coefficients, `CountRoots[]` is a useful thing.
7h	revised	Smooth Kernel Distribution edited tags
8h	comment	How can I create a list of functions? Of course, one could also do `f[i_][t_] := t i^2`, which allows for nice constructions like `f[2] /@ Range[5]`.
9h	comment	How do I compute sidereal time and JD? @raxacoricofallapatorius, for now I'll leave it out; I don't have version 9 for checking, but users should have no trouble adding `If[$VersionNumber >= 9 && y < 0, y++]`.
11h	comment	Nontrivial solutions of equation ...if $\lambda$ is in fact an eigenvalue of your system, then you can use @Jens's suggestion and pick out an appropriate eigenvector that you can then normalize. If not, then you have a nonsingular system of linear equations, easily handled by `Solve[]`.
13h	revised	Adding custom GridLines to the “automatic” ones deleted 3 characters in body
18h	revised	Strange Behavior of NDSolve edited tags
18h	revised	Creating a simulation of our Solar System edited tags
19h	comment	Returning a non-degenerate list of triangles that (strictly) define the outer mesh of a 3-polytope using PolyhedronData? I don't understand what you mean. `Normal[PolyhedronData["Icosahedron", "Faces"]]` returns the twenty faces, as expected.
19h	revised	Returning a non-degenerate list of triangles that (strictly) define the outer mesh of a 3-polytope using PolyhedronData? edited tags
21h	comment	Adding custom GridLines to the “automatic” ones @Bernd, no need for excess; `Scaled[{0, 1}, {DateString[{#, {"Day", "Month", "Year"}}], 0}]` is sufficient.
22h	comment	What does Binomial return for non-integer arguments? @Szabolcs, "...it's probably not directly using the formula in terms of $\Gamma$ functions...", yes, likely combinations of `LogGamma[]` are used before exponentiating.
1d	comment	Adding custom GridLines to the “automatic” ones @Ajasja, good point. I suppose it depends on whether you want the distinguishing markers to go over or under the plot.
1d	revised	How do I obtain the correct double limit? edited tags
1d	revised	What do the options of SmoothKernelDistribution do? edited tags
1d	comment	What does Binomial return for non-integer arguments? The factorials are just replaced with gamma functions for noninteger arguments, since $n!=\Gamma(n+1)$.
1d	revised	How to demodulate an FM signal in continuous-time? added 5 characters in body
1d	comment	Adding custom GridLines to the “automatic” ones Here, the notation is not too hard to parse. `Scaled[{0, h}, start]` corresponds to a scaled vertical offset from the point `start`; positive values of `h` go up, and negative values of `h` go down. `h == -1` is the bottommost position, and `h == 1` is the topmost. The situation is similar for horizontal offsetting, with `Scaled[{h, 0}, start]`.