▼	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
▼	Semigroup
▼	Standard N-operation
▼	Indexed sum
▼	Series
▼	Power series
▼	Convergent power series
▼	Convergent basic real power series
▼	Standard natural real exponential function

▶	R5197: Characterisation of natural real exponential function by a differential equation
▶	R2962: Characterisation of standard natural real exponential function by a differential equation

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