Similar to ミルズの定数
 - 15・290定理15 and 290 theorems
 - 1-形式One-form (differential geometry)
 - 1の分割Partition of unity
 - 2-形式Two-form
 - 2の立方根
 - 3つの立方数の和Sums of three cubes
- 3人の子供の年齢のパズルAges of Three Children puzzle
 - 4次元多様体4-manifold
 - 68–95–99.7則68–95–99.7 rule
 - 6j記号6-j symbol
 - AB5 圏AB5 category
 - ABC@homeABC@Home
 - Acta MathematicaActa Mathematica
 - ADF-GLS検定ADF-GLS test
 - AKS素数判定法AKS primality test
 - AMS-LaTeXAMS-LaTeX
 - AMS-TeX
 - Analyse des infiniment petits pour l'intelligence des lignes courbesAnalyse des infiniment petits pour l'intelligence des lignes courbes
 - Annali di Matematica Pura ed ApplicataAnnali di Matematica Pura ed Applicata
 - Annals of MathematicsAnnals of Mathematics
 - Apache Commons Math
 - Arg maxArg max
 - Arithmetica
 - Arthur–MerlinプロトコルArthur–Merlin protocol
 - Axiom (数式処理システム)Axiom (computer algebra system)
 - A¹ ホモトピー理論A¹ homotopy theory
 - A∞-オペラドA∞-operad
- B*-環