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  • 0 posts edited
  • 1 helpful flag
  • 35 votes cast
Nov
19
awarded  Notable Question
Nov
2
accepted Directions to the Algebra Zoo?
Nov
2
revised Directions to the Algebra Zoo?
added 147 characters in body
Nov
2
comment Directions to the Algebra Zoo?
The latter, yes.
Nov
2
asked Directions to the Algebra Zoo?
Oct
30
comment Alternative Arithmetics
If there examples of truly novel arithmetic, I'd be really excited to hear about them. This game is really, really limited, and admittedly not exciting. Are there other things that are exciting?
Oct
30
comment Alternative Arithmetics
I think you're getting stuck on aspects of the question I don't really care about. I'm not claiming that this is an unprecedented mathematical system totally new in mathematics, or that there's no way to reduce it to pre-existing systems. Just that, for the people who were learning the system, it was something they hadn't seen before.
Oct
30
comment Alternative Arithmetics
Yeah, it's pretty simple, and it's really easy to come up with a different way to think about it. But the point is that it's an example of the kind of 'novel arithmetic' I'm curious about.
Oct
30
asked Alternative Arithmetics
Oct
23
awarded  Informed
Sep
28
accepted Under what conditions does matrix multiplication commute?
Sep
28
revised Under what conditions does matrix multiplication commute?
deleted 30 characters in body
Sep
28
revised Under what conditions does matrix multiplication commute?
deleted 30 characters in body
Sep
28
comment Under what conditions does matrix multiplication commute?
@IvanNeretin Oh ok. I see where I messed up then. Thanks! I didn't know about \limit. I've always just written it the other way.
Sep
28
revised Under what conditions does matrix multiplication commute?
added 18 characters in body
Sep
28
revised Under what conditions does matrix multiplication commute?
added 3 characters in body
Sep
28
comment Under what conditions does matrix multiplication commute?
@user1551 Hm. The summation is supposed to capture that each entry is the inner product of a row of A and a column of B (or the other way around).
Sep
28
asked Under what conditions does matrix multiplication commute?
Dec
18
awarded  Caucus
Oct
31
comment Probability (X >Y) when X and Y have the same distribution?
"Let Y be the next day after X" - i.e. Y = X + 1 (mod 7). The only way that X + 1 > Y is if X = 7. Basically, you're reasoning isn't wrong, it's just that you misread the question. I do this all the time.