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Skip's user avatar
Skip
  • Member for 13 years, 10 months
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41 votes
Accepted

Has the Lie group E8 really been detected experimentally?

17 votes
Accepted

Wanted: Quadratic Space in Characteristic 2 as a Counterexample to a Theorem of Arf

12 votes

What is the Implicit Function Theorem good for?

11 votes
Accepted

Division algebras in which every proper subfield is maximal

11 votes

Beautiful descriptions of exceptional groups

9 votes
Accepted

Is a 8-dimensional quadratic form recognized by its Lie algebra, modulo equivalence and scalar multiplication?

8 votes
Accepted

Occurrence of semi-spin groups

8 votes
Accepted

reduced norm from degree 3 division algebra

8 votes

How do Jordan algebras help one understand representations of exceptional Lie algebras?

7 votes
Accepted

Root system automorphisms as inner automorphisms of extended Chevalley group

6 votes

Which groups have only real and quaternionic irreducible representations?

6 votes
Accepted

substitute for Serre's twisting when the "twisting" is outer

5 votes

Simplicity of (complex) orthogonal groups

5 votes
Accepted

Algebra with positive definite symmetrizing trace is semisimple.

4 votes

Uniqueness of maximal subfields

3 votes
Accepted

Constructing groups of Type E^{66}_{7,1} having non trivial Tits algebra

2 votes
Accepted

The Tits classes of simply connected simple real groups

2 votes
Accepted

Real automorphisms of the "quaternionic" real group ${\rm SO}^*(4m)$

2 votes

For what reductive groups $G$ over $K$ are the inner forms classified by $H^1(K, G^{ad})$?

1 vote
Accepted

What are the Tits algebras of $\mathrm{SO}(A, \sigma)$ if $A$ is split?