5,311 reputation
930
bio website cs.ox.ac.uk/people/…
location Oxford, United Kingdom
age 51
visits member for 4 years, 7 months
seen 8 hours ago

May
2
reviewed Close Heat asymptotics
May
1
comment Do unit quaternions at vertices of a regular 4-simplex, one being 1, generate a free group?
wouldn't this imply that the multiplicative group of quaternions contains a free group on 4 symbols? This is rather surprising to me.
Apr
30
revised Number of matrices with given Smith normal form
tags added
Apr
30
answered Number of matrices with given Smith normal form
Apr
30
reviewed Close Two basic questions concerning geometrically ruled surfaces.
Apr
30
comment the complex representations of $B(2, \overline{\mathbb{F}_p})$
and what is $B(2,F)$ ? And what is the Mackey method you mention - provide a reference...
Apr
30
revised the complex representations of $B(2, \overline{\mathbb{F}_p})$
texify and improve style
Apr
30
comment Number of matrices with given Smith normal form
this is essentially about counting presentations of a f.g. Abelian group with a given upper bound on size.
Apr
30
comment the complex representations of $B(2, \overline{\mathbb{F}_p})$
please see the Help on how to properly typeset maths here. Thanks.
Apr
30
comment the complex representations of $B(2, \overline{\mathbb{F}_p})$
what is Fp? Is it $\mathbb{F}_p$? Or something else?
Apr
29
reviewed Leave Open Is there something like “Noncommutative geometry internal to a category”?
Apr
29
reviewed Leave Open Rees rings and a formula
Apr
29
reviewed Leave Open Area of a plane surface that gives a lot of theoretical problems
Apr
29
reviewed Leave Open Suggestions on the best introductory Model Theory texts
Apr
28
reviewed Leave Closed Mathematics of Computer science and AI
Apr
28
reviewed Close Plane measurable sets and measurable rectangle
Apr
28
reviewed Leave Open Obstructions for a group to be the multiplicative group of a field
Apr
28
comment Generalization of Schur polynomials
@PerAlexandersson: hmm, sorry, I thought I saw there something like the Cauchy identity. But perhaps I was dreaming :-)
Apr
28
comment lower bound on A(k,4,floor(k/2))
Did you compare this with known upper bounds (e.g. Delsarte bound)?
Apr
28
revised lower bound on A(k,4,floor(k/2))
added 18 characters in body