Jens
Reputation
69,848
1551/1000 score
 Apr 7 comment Can I plot a cone about an arbitrary axis in 3D? Why not use the built-in Cone? Apr 7 comment Outer product using the quantum mathematica package Closely related (though not using any packages): Pull out scalars from NonCommutativeMultiply in commutator of SU2 spin algebra. The answer there should also apply here: use KroneckerProduct. So in other words, don't use Mathematica's tensor functions. See also here. Apr 7 comment Is this a serious flaw in Mathematica's default hashing algorithm I get False for Hash[X]==Hash[Y], on Mathematica version 10.3.1 for Mac OS X. Likewise for the prepended versions. Apr 6 comment How to type text with an underbrace underneath it like: $\underbrace{g…g}_{n-times}$? There's also this palette that I made for a different question. Apr 6 answered how to convert a bundle of if statements into a simple one. Apr 6 awarded Announcer Apr 5 awarded Necromancer Apr 4 awarded Revival Apr 4 awarded Enlightened Apr 4 awarded Nice Answer Apr 3 comment What are the idiosyncrasies which are worked around in these two MSE answers? I wonder if this should be addressed directly to @F'x. Apr 2 comment Animate spherical pendulum There are several demos for this on the Wolfram site, see e.g. here Apr 2 revised Derivatives of piecewise functions of functions Piecewise approach Apr 2 comment Derivatives of piecewise functions of functions @Virgil I added the "workaround" for the case you mentioned, showing the extent to which Limit can do what you ask. However, it's probably not as "automated" as you want. However, not knowing anything about g, I don't see a better alternative right now. Apr 2 revised Derivatives of piecewise functions of functions Edit to address comment Apr 2 comment Derivatives of piecewise functions of functions @Virgil The substitution g[b] -> 1 isn't going to work anyway because it leaves g' untouched. But I think I understand what you mean. You want to keep g unspecified until the end, not give it a definition at the beginning, right? Then I guess the limit approach wouldn't help. I think it only works if the inner function is already defined so that the singular point in the outer function can actually be identified. Apr 2 comment Derivatives of piecewise functions of functions @MathX While you wrote this, I answered with essentially the same general thought... Apr 2 answered Derivatives of piecewise functions of functions Apr 1 comment Ticks in v10 - a bug or undocumented change @rcollyer I added the bugs tag because I can't access version 10.4 yet and it definitely doesn't work properly in 10.3. Apr 1 revised Ticks in v10 - a bug or undocumented change Added bugs tag according to rcollyer's note for 10.3