In mathematics, a Sastry automorphism, is an
automorphism
In mathematics, an automorphism is an isomorphism from a mathematical object to itself. It is, in some sense, a symmetry of the object, and a way of mapping the object to itself while preserving all of its structure. The set of all automorphisms ...
of a
field of
characteristic 2 satisfying some rather complicated conditions related to the problem of embedding
Ree groups of type
2F
4 into
Chevalley groups of type F
4. They were introduced by , and named and classified by who showed that there are 22 families of Sastry automorphisms, together with 22 exceptional ones over some finite fields of orders up to 2
10.
References
*
* {{Citation , last1=Sastry , first1=N. S. Narasimha , title= Large uniqueness, up to conjugacy, of the finite Ree and Suzuki simple groups in the defining group of Lie type , series=Preprint , year=1995
Finite groups
Finite fields