An invariant series of a group 
is a normal series
 |
such that each 
,
where 
means that 
is a normal subgroup of 
.
Invariant Series
See also
Composition Series, Normal SeriesExplore with Wolfram|Alpha
References
Scott, W. R. Group Theory. New York: Dover, p. 36, 1987.Referenced on Wolfram|Alpha
Invariant SeriesCite this as:
Weisstein, Eric W. "Invariant Series." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/InvariantSeries.html