ThmDex – An index of mathematical definitions, results, and conjectures.
Set of symbols
Alphabet
Deduction system
Theory
Zermelo-Fraenkel set theory
Set
Subset
Power set
Hyperpower set sequence
Hyperpower set
Hypersubset
Subset algebra
Boolean algebra
Sigma-algebra
Discrete sigma-algebra
Discrete measurable space
Point-mass measure
Counting measure
Counting measure space
Standard counting measure space
Definition D5641
Standard counting measure space of basic natural numbers
Formulation 0
A triple $M = (\mathbb{N}, \mathcal{P}(\mathbb{N}), \#)$ is the standard counting measure space of basic natural numbers if and only if
(1) $\mathbb{N}$ is the D225: Set of natural numbers
(2) $\mathcal{P}(\mathbb{N})$ is a D80: Power set for $\mathbb{N}$
(3) $\#$ is the D5637: Standard basic natural number counting measure on $M$