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Jul
2
awarded  Curious
Apr
27
awarded  Yearling
Mar
21
awarded  Popular Question
Feb
9
accepted How many finite groups (up to isomorphism) are abelian?
Feb
7
comment How many finite groups (up to isomorphism) are abelian?
user58512 is right.
Feb
7
asked How many finite groups (up to isomorphism) are abelian?
Dec
1
asked QR decomposition of column swapped matrix
Aug
7
accepted Generalization of metric spaces
Aug
6
awarded  Commentator
Aug
6
comment Generalization of metric spaces
Not sure if I asked the question properly. Basically I'm wondering whether spaces where non-negativity and the "identity of indiscernibles" don't hold (of which subtraction of real numbers is an example) have been studied or are worth studying at all.
Aug
6
comment Generalization of metric spaces
$d(x,y) = 0$ iff $x = y$ would still work. I am unsure if an analog to the triangle inequality would work.
Aug
6
asked Generalization of metric spaces
Jul
23
accepted Difference between “space” and “algebraic structure”
Jul
23
awarded  Nice Question
Jul
23
awarded  Yearling
Jul
23
accepted Is every set a subset?
Jul
23
comment Is every set a subset?
Too obvious. Thanks!
Jul
23
comment Difference between “space” and “algebraic structure”
As I understand it an algebraic structure with at least one operation defined on it. Isn't a metric space an algebraic structure where that operation is "distance", with the regular axioms?
Jul
23
asked Is every set a subset?
Jul
23
asked Difference between “space” and “algebraic structure”