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Oct
2
asked Basis of vector space invariant under group action (of symmetric group)
Sep
10
comment Approximate root of $\alpha x - \beta y$ over $\mathbb Z$ except origin
@RobertIsrael Can you give more hints? I have no clue where to start with this.
Sep
10
comment Approximate root of $\alpha x - \beta y$ over $\mathbb Z$ except origin
Assuming $\beta > 0$, I see the equivalences. But what does it tell?
Sep
10
comment Approximate root of $\alpha x - \beta y$ over $\mathbb Z$ except origin
Has been a late night. Of course, the origin is excluded.
Sep
10
revised Approximate root of $\alpha x - \beta y$ over $\mathbb Z$ except origin
added 20 characters in body; edited title
Sep
9
asked Approximate root of $\alpha x - \beta y$ over $\mathbb Z$ except origin
Jul
18
comment Canonical term for $\overline X / X$ where $X$ is a normed space.
This appears in the theory of Hilbert complexes, as quotient of the closure of the boundaries by the boundaries. More, generally, for Banach complexes see: link.springer.com/article/10.1007%2FBF02922133?LI=true
Jul
17
asked Canonical term for $\overline X / X$ where $X$ is a normed space.
Jul
3
asked Empty set in a simplicial complex
Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
Apr
24
awarded  Good Question
Mar
31
awarded  Notable Question
Feb
26
awarded  Favorite Question
Jan
21
asked Universal property of tensor products / Categorial expression of bilinearity
Nov
16
awarded  Yearling
Nov
13
awarded  Notable Question
Sep
9
comment Formula for surface measure of spherical cap on $S^n$.
In the section 'hyperspherical cap', the wikipedia article gives a formula for the surface in terms of regularized incomplete beta functions. I wonder whether a single integral formula like for the volume, at the beginning of the same section, does exist.
Sep
8
comment Formula for surface measure of spherical cap on $S^n$.
I am specifically looking for formulas nicer than there.
Sep
8
asked Formula for surface measure of spherical cap on $S^n$.