(category theory) A morphism which yields the same morphism when post-composed with either one of a parallel pair of morphisms.

plural of Feigenbaum constant

(mathematics) Either of two mathematical constants that express ratios in a bifurcation diagram for a nonlinear map.

(physics) The fine-structure constant.

(chemistry, physics) The number of atoms present in 12 grams of isotopically pure carbon-12, being 6.02214076 × 10²³. By definition, the number of elementary entities (atoms or molecules) comprising one mole of a given substance.

Alternative form of Avogadro constant

(calculus) a constant that may be introduced upon separation of variables

plural of Stieltjes constant

(mathematics) Any of a certain series of numbers that occur in the Laurent series expansion of the Riemann zeta function.

Alternative form of Dirac constant.