(chemistry, physics) Synonym of screening constant

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

(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

(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.

(mathematics) The constant 1.303577269034..., an algebraic number of degree 71, related to the limit of the growth of the look-and-say sequence.