▼	Set of symbols
▼	Alphabet
▼	Deduction system
▼	Theory
▼	Zermelo-Fraenkel set theory
▼	Set
▼	Binary cartesian set product
▼	Binary relation
▼	Map
▼	Operation
▼	N-operation
▼	Binary operation
▼	Enclosed binary operation
▼	Groupoid
▼	Ringoid
▼	Semiring
▼	Ring
▼	Left ring action
▼	Module
▼	Linear combination
▼	Linear map
▼	Linear form
▼	Distribution
▼	Distributional derivative
▼	Weak derivative
▼	Real matrix function derivative
▼	Euclidean real function derivative
▼	Strong directional derivative
▼	Strong partial derivative
▼	Partial slope

▶	Maximal value for a directional derivative at a point
▶	Tight upper bound to directional derivative

Conventions · Comments · Examples · Expositions · Glossary · Lores · Quotes · Remarks · Techniques