Formulas
- Wu-Chung Hsiang
- Orthogonal symmetric Lie algebra
- Polydivisible number
- Separable polynomial
- Star product
- Harmonic wavelet transform
- Tarski's theorem about choice
- Harmonious set
- Harmonograph
- Unimodality
- Unistochastic matrix
- Vitale's random Brunn–Minkowski inequality
- Harries–Wong graph
- Hellinger–Toeplitz theorem
- Yusuf al-Mu'taman ibn Hud