Triangle Function
 |  |  | (1) |
 |  | (2) | |
|  | (3) |
where
is the Rectangle Function and 
is the Heaviside Step Function. An obvious generalizationused as an Apodization Function goes by the name of the Bartlett Function.There is also a three-argument function known as the triangle function:
 | (4) |
 | (5) |
- 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
- Endraß Octic
- Energy
- En-Function
- Engel's Theorem