write (La)TeX maths directly in your Gmail

http://www.reddit.com/r/math/comments/elm52/in_retrospect_my_thoughts_on_the_program_math_in/

надо добыть
I.Pushkarev, On the representation theory of wreath products of finite groups and symmetric groups,
Journal of Mathematical Sciences
ISSN 1072-3374 (Print) 1573-8795 (Online)
Volume 96, Number 5 / October, 1999,
или оригинал:
Zapiski Nauchnykh Seminarov POMI, Vol. 240, 1997, pp. 229-244.

А то у нас на острове нету...

What can be said about the subalgebra of the Lie algebra su(2n) generated by 3n matrices of the form E⊗...⊗E⊗A⊗E⊗...⊗E (n-fold tensor product), where E is the 2x2 identity matrix and -iA is one of the Pauli matrices, i.e.

( Read more... )

... A nasty little bug in Excel 2007 came to light, whereby the result of computing, for example, 850*77.1 is displayed as 100000:


( Read more... )

spent most of the day teaching a MSc student (not mine, but of our HOD, who is o/seas) a bit of group theory and projective geometry
(in particular, cross ratio of quadriples of points on a projective line)
It turns out it's quite useful to construct certain codes over F3
Dug up for him two wonderful sets of lecture notes by Peter Cameron: ( Read more... )