A group 
is a component of 
if 
is a quasisimple group which is a subnormal
subgroup of 
.
Component
See also
Group, Quasisimple Group, Subgroup, Subnormal SubgroupExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Component." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Component.html