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Jan-Dvorak @ Miaou
Honnza @ gmail.com

"Haven't you heard? Crowdsourcing to stackOverflow is the new trend in basic debugging."

-- Jan Dvorak

"There are only two hard things in Computer Science: cache invalidation, naming things and off-by-one errors"

-- variation of Phil Karlton's quote


1d
comment Is this rule for graph isomorphism true?
another example, from chemistry: 2-methyl-pentene (isohexane) and 3-methyl-pentene (with the methyl group sitting in the middle)
1d
comment Is this rule for graph isomorphism true?
- are edges, and + represents three vertices and four edges. Unfortunately, it's hard to draw a branching structure in ASCII
1d
comment Is this rule for graph isomorphism true?
no: o-o+o-o o-o-o+o
2d
comment What is the largest value one can get in game 2048 without new tiles appear
If you don't mind occasional overestimation, you can just repeatedly merge like tiles assuming they can be brought together somehow. In your example, you can't acctually merge those two 8s, but the result is the same as if you could.
2d
comment Multiply two polynomial in O(nlog n) time
can you expand your answer? I guess you FFT both inputs (O(n log n)), then... what?
Sep
24
awarded  Autobiographer
Sep
22
comment Pr0ve the following using a direct proof
@N.F.Taussig bypassing the quality filter using leet-speak, apparently
Sep
9
comment $6$ women and $4$ men wait in line. If their order in line is random, find the probability that all of the women are adjacent to one another.
how did this question get into the hot questions list?
Sep
9
comment Appolonius circle with $\infty$ as one limit point.
A circle that goes through infinity sounds like a line to me.
Sep
6
comment How to calculate the direction (of velocity of a ball) after collision with another ball?
@CengizFrostclaw the velocity absolutely isn't. If nothing else, this would break the conversation of momentum - unless you choose a reference frame that has the balls moving along the same line initially. The change in velocity is.
Sep
6
comment How to calculate the direction (of velocity of a ball) after collision with another ball?
@Asimov well, if you don't have friction, your balls won't stop. If you have friction with the table but not between two balls, it's unrealistic.
Sep
6
comment How to calculate the direction (of velocity of a ball) after collision with another ball?
"The resulting direction of the target ball is perpendicular to that plane" - absolutely not. Did you mean the change in velocity?
Sep
6
comment How to calculate the direction (of velocity of a ball) after collision with another ball?
You could have removed the text ad, btw.
Sep
6
comment How to calculate the direction (of velocity of a ball) after collision with another ball?
It also depends on friction. I assume the balls don't just grind to a halt by air drag?
Sep
4
comment A sphere that contains a circle and a point
@Vivek there's only one line perpendicular to the $k$-sphere going through its center in the $k+1$-dimensional subspace containing the sphere and the point. A line intersecting with a `$k$-dimensional space in a $k+1$-dimensional space generally results in a pointlike intersection - the center of the $k+1$-dimensional sphere.
Sep
2
comment ABCDE + BCDE + CDE + DE + E = AAAAA
Is this an answer, or a question? If it's an answer, what does it say that the other one doesn't? Apart from that... people don't like reading handwriting on the Internet. Also, search engine bots don't. Also, people reliant on screen readers don't.
Aug
28
comment multiply fraction with what number to get a whole number?
12/13 * 13 = 12. I guess you can follow the pattern?
Aug
14
comment IEEE754 32-bit single precision format
Much better, thanks!
Aug
14
comment IEEE754 32-bit single precision format
Weird... why do I read $3{\tt D}$ as a single hexadecimal number instead of ${\tt D}$ meaning "decimal"?
Aug
5
awarded  Deputy