Formulas
- Weinstein conjecture
- Weyr canonical form
- Wiener process
- Wilf–Zeilberger pair
- William Spence (mathematician)
- Winding number
- Wirtinger's inequality for functions
- Wold's decomposition
- Woodbury matrix identity
- Word problem for groups
- Z-matrix (mathematics)
- Zahorski theorem
- Zassenhaus lemma
- Zeno machine
- Zero of a function