User:Mat cross

$\sum_{i=1}^{\infty}{1 \over i^2}$

This user is an advanced mathematician.

This user is a software engineer.

which & that

This user knows how to use which and that correctly.

Penn	This user attends or attended the University of Pennsylvania.

Mix

This user has been influenced by too many dialects of English to use one orthography, vocabulary and grammar consistently.

$0.\bar{9}$ =1

This user knows that 0.999... is exactly 1, but acquired a migraine learning it.

en	This user is a native speaker of English.

de-1

Dieser Benutzer hat grundlegende Deutschkenntnisse.

fr-1

Cet utilisateur peut contribuer avec un niveau élémentaire de français.

gtr-3

This user is an advanced guitarist.

The page owner, propping up a brewery.

[edit] Primary interests

Thesis: `Symplectic Integrators and Optimal Control'. Advisor: T. Shardlow.

Thesis: `If a Finitely Generated Group is of Near-Polynomial Growth

then it has a Nilpotent Subgroup of Finite Index'. Adviser: J. Block.

Thesis: `Causality on Spacetimes'. Advisor: J. Rawnsley.