q-Derivative
The q-Analog of the Derivative, defined by
For example,
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In the Limit
, the 
-derivative reduces to the usual Derivative.See also Derivative- Self-Adjoint Operator
- Self-Avoiding Walk
- Self-Conjugate Subgroup
- Self-Descriptive Number
- Self-Homologous Point
- Self Number
- Self-Reciprocating Property
- Self-Recursion
- Selfridge-Hurwitz Residue
- Selfridge's Conjecture
- Self-Similarity
- Self-Transversality Theorem
- Selmer Group
- Semialgebraic Number
- Semianalytic
- Semicircle
- Semicolon Derivative
- Semiconvergent Series
- Semicubical Parabola
- Semiderivative
- Semidirect Product
- Semiflow
- Semigroup
- Semi-Integral
- Semilatus Rectum