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May
22
suggested approved edit on How do I explain why $dA/dr = 2 \pi r$ geometrically?
May
20
comment Logic Puzzle of the age of three sons
@Fixee: [chuckle] Yes, but would you SAY that? :P Actually...you'd probably put in a comment about birthdays... :P
May
19
revised Logic Puzzle of the age of three sons
Fixed mistakes and added a bit.
May
19
comment Logic Puzzle of the age of three sons
@svenkatr: Good catch. Editing...
May
19
answered Logic Puzzle of the age of three sons
May
18
revised Solving an equation with the same variable twice
Removed my unnecessary editor's note.
May
18
suggested approved edit on Solving an equation with the same variable twice
May
18
revised Solving an equation with the same variable twice
LaTeX formatting.
May
18
suggested approved edit on Solving an equation with the same variable twice
May
18
awarded  Nice Answer
May
18
comment How many 10 letter 'words' can be made with no repeated letters and at least 8 consonants?
Note to everyone: this is similar to math.stackexchange.com/questions/39428/… , but it's different enough that I think it warrants its own solution.
May
18
comment Counting number of distinct regions with intersecting circles
@soandos: Yes, "exterior" does mean the space occupied by no circles, so your "13" is correct. Also, as the OEIS entry makes no mention of the size of the circles, I think it's any sized circles.
May
18
comment $n$ by $n$ Primally Magic Squares
@Jacob: Nice links! Those are not quite what I'm going for here though; my condition is merely that each column, row, and diagonal needs to be prime in at least one direction, not both as they did.
May
17
comment calculate location on an isometric world map
Actually, u and v are Cartesian values as well. Also, that image seems to be a rotate-then-transform kind of thing, so my formulas may be wrong, although I haven't checked.
May
17
comment (Non-)Conservative Vector Fields
@joriki: Apologies if it seems I have been inattentive or inconsiderate, but I have merely been pondering your reply. :)
May
17
comment Cube skeleton bindings
@Jim Conant: If edges connecting opposite vertices in the octahedron weren't included, then only 4 of my solutions could be found. Also, the dividing-by-the-automorphisms comes from my mathematical idealization of a physical scenario... :P
May
17
comment Cube skeleton bindings
@Jim Conant: By 1-skeleton, you mean an octahedron with opposite vertices also connected, yes? Also, I'm actually more concerned with the number of solutions; enumeration is more easily accomplished with a computer program.
May
17
comment Cube skeleton bindings
@Jim Conant: Extending it to other solids is precisely why I asked for an analytical method... :P To be more accurate, any polyhedron with an even number of faces can be done this way.
May
16
answered calculate location on an isometric world map
May
16
asked Cube skeleton bindings