Nilpotent Group
A Group 
for which the chain of groups
with
(equal to the Center of 
) terminates finitely with 
is called anilpotent group.See also Center (Group), Nilpotent Lie Group- Zigzag Permutation
- Zig-Zag Triangle
- Zillion
- Zipf's Law
- Z-Number
- Zollner's Illusion
- Zonal Harmonic
- Zone
- Zonohedron
- Zonotype
- Zorn's Lemma
- z-Score
- Zsigmondy Theorem
- Z-Transform
- z-Transform
- z-Transform (Population)
- Embeddable Knot
- Embedding
- Empty Set
- e-Multiperfect Number
- Enantiomer
- Enantiomorph
- Encoding
- Endogenous Variable
- Endomorphism