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Sep
6
comment Complex surface: Finding the perimeter of the union of multiple disc intersections
Then the end result is the intersection of $N$ circles, right? So there is no further need to form a union in the end. Then the final situation is actually easier to solve than the intermediate steps, especially if you're allowed to pick, e.g., three arbitrary circles out of the $N$ given circles. In the end, one has a shape with an $N$ fold rotation symmetry, but that can't be exploited for the intermediate steps. It would help a great deal if you showed what attempts at a solution you have already tried, and maybe to sketch the desired end product (maybe I misunderstood it).
Sep
6
comment ArcTan and Compile
@AndreasLauschke It's OK to leave the links for completeness, I'd say.
Sep
6
answered Modelling the effect of a structure on a “tsunami” (hyperbolic wave equation)
Sep
6
comment ArcTan and Compile
@AndreasLauschke I'm guessing you want to confirm the equivalence of the Arg and ArcTan methods. But the links don't seem to address the discrepancy between the definitions at the origin.
Sep
6
comment ArcTan and Compile
@AndreasLauschke Could you explain what the links above are intended for?
Sep
6
comment Guidelines on giving readable names to variables
For readable variable names, my own preference is to follow what Mathematica itself does for practically all function names that are composed of several words: use en.wikipedia.org/wiki/Camelcase, except for the first letter of the variable which should be lower case to distinguish it from built-in names (which are always capitalized).
Sep
6
answered ArcTan and Compile
Sep
5
reviewed Leave Open How do I type boxtimes?
Sep
5
comment Blank VectorPlot
@Blackbird You're not plotting the desired function at all if you replace x and y by constants.
Sep
5
comment Blank VectorPlot
@Blackbird I've tried my solution in version 8 and 9, and it does the trick. In both cases, the Abs'[...] was the culprit. Not sure what exactly you did.
Sep
5
answered Blank VectorPlot
Sep
4
answered Writing intelligent replacement rules for symbols
Sep
4
comment Writing intelligent replacement rules for symbols
This is part of the answer. However, the rules also require non-commuting operations, so even the starting point using Power or Times here isn't actually correct for the desired application.
Sep
4
comment Writing intelligent replacement rules for symbols
Have a look at this question
Sep
4
comment How to make traditional output for derivatives
Maybe this blog entry which is linked in the earlier answers I linked to will answer this. Defer is discussed as an alternative there, too.
Sep
1
comment How to find the domain and range of an implicit function?
All your examples are polynomial equations.
Sep
1
answered How to find the domain and range of an implicit function?
Sep
1
answered The space in default output of `ExportString` to Latex
Sep
1
revised How to implement this simple product rule in mathematica
Addressed orig. example
Sep
1
answered How to implement this simple product rule in mathematica