Appell Transformation
A Homographic transformation
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with
substituted for 
according to
References
Hazewinkel, M. (Managing Ed.). Encyclopaedia of Mathematics: An Updated and Annotated Translation of the Soviet ``Mathematical Encyclopaedia.'' Dordrecht, Netherlands: Reidel, pp. 210-211, 1988.
- Unipotent
- Unique
- Unique Factorization Theorem
- Unit
- Unital
- Unitary Aliquot Sequence
- Unitary Amicable Pair
- Unitary Divisor
- Unitary Group
- Unitary Matrix
- Unitary Multiperfect Number
- Unitary Multiplicative Character
- Unitary Perfect Number
- Unitary Sociable Numbers
- Unitary Transformation
- Unitary Unimodular Group
- Unit Circle
- Unit Disk
- Unit Fraction
- Unit Matrix
- Unit Point
- Unit Ring
- Unit Sphere
- Unit Square
- Unit Step