Similar to 1の補数

S (programming language)

Sigma-ring

T1 space

The Mathematical Gazette

Theorema Egregium

Tor functor

Thousands of Problems for Theorem Provers

True quantified Boolean formula

Pi#In popular culture

Student's t-test

Student's t-distribution

Undergraduate Texts in Mathematics

UP (complexity)

Vectorization (mathematics)

WIRIS

Wolfram Demonstrations Project

Xorshift

X-ray transform

Yacas

ZbMATH Open

List of statements independent of ZFC

ZPP (complexity)

Z-matrix (mathematics)

Z-test