Similar to 双球座標系
 - P進数P-adic number
 - P進付値P-adic valuation
- P≠NP予想P versus NP problem
 - P-進分布P-adic distribution
 - Q.E.D.Q.E.D.
 - Q-QプロットQ–Q plot
 - QR分解QR decomposition
 - 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