Peano axiom
prime quantity
prime
pairing function
number
harmonic number
theoretical physics
IP set
triangular number
genus
arithmetical set
arithmetic combinatorics
composite number
transcendental number theory
real number line
hyperreal number
set
pentimal
integerness
sequence
Peano arithmetic
Narayana number
extended real number system
Catalan number
Church numeral
ordinal number
numbering
Gödel number
deployment
Dirichlet series
cyclotomic field
arithmography
natural unit
algebraic integer
Cullen number
kingdom
transcendental number
real number system
semiprime
number-theoretic function
aleph-one
Pell number
Roman numerals
prime number
conjugate
irrational
irrational number
weird number
complex conjugation
Fourier series