(mathematics) The number G=𝛽(2)=∑ₙ₌₀ ᪲((-1)ⁿ)/((2n+1)²)=1/(1²)-1/(3²)+1/(5²)-1/(7²)+1/(9²)-⋯, where β is the Dirichlet beta function, with a value of approximately 0.915965594177…

(mathematics) A transcendental real constant, denoted by C₁₀, whose decimal expansion has important properties.

plural of magic constant

(mathematics, number theory) The sum of numbers in any row, column, or diagonal of a magic square.

plural of Madelung constant

(electrodynamics) The fundamental physical value α, presumed to be constant, that characterizes the strength of the electromagnetic force.

Alternative form of fine-structure constant

(airplanes) Something that aims at ensuring that the electric generator produces a constant frequency.

(number theory) The constant of proportionality (approximately 0.7642) in the relationship between the number of positive integers less than x that are the sum of two square numbers, for large x, and the expression x/√.

(chemistry) The equilibrium constant for the dissociation of an acid, and thus a measure of its strength