Simple group of Ree type

This article defines a group property that can be evaluated, or makes sense, for simple groups

This article is about a definition in group theory that is standard among the group theory community (or sub-community that dabbles in such things) but is not very basic or common for people outside.
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Definition

A simple group of Ree type is a finite simple non-Abelian group satisfying the following conditions:

• It has an Abelian Sylow 2-subgroup
• It contains an involution $t$ such that

$C_{G}(t)=<t>\times PSL(2,q)$

where $q>5$.

The case $q=5$ corresponds instead to the Janko group (since $PSL(2,5)=A_{5}$).