Similar to ベイズ推定
 - QR法QR algorithm
 - Q-ガウス分布Q-Gaussian distribution
 - Qザールシュッツの和公式
 - Q超幾何級数Basic hypergeometric series
 - Q二項定理Gaussian binomial coefficient
 - Q-類似Q-analog
 - Qポッホハマー記号Q-Pochhammer symbol
 - R (計算複雑性理論)R (complexity)
 - RE (計算複雑性理論)RE (complexity)
 - RemezのアルゴリズムRemez algorithm
 - Risa/Asir
 - RP (計算複雑性理論)RP (complexity)
 - RSA暗号RSA cryptosystem
 - Ryll-Nardzewskiの不動点定理Ryll-Nardzewski fixed-point theorem
 - SASTRAラマヌジャン賞SASTRA Ramanujan Prize
 - Scripta MathematicaScripta Mathematica
 - SIAM (学会)Society for Industrial and Applied Mathematics
 - Sinc関数Sinc function
 - SINGULAR (数式処理システム)Singular (software)
 - SL (計算複雑性理論)SL (complexity)
 - SLATECSLATEC
 - Small set (組み合わせ論)Small set (combinatorics)
 - Smn定理Smn theorem
 - SO(2)
 - SOR法Successive over-relaxation
 - SR1法Symmetric rank-one
 - Sum-free setSum-free set
 - SumsetSumset