(mathematics) A finitely axiomatized fragment of first-order Peano arithmetic, lacking the axiom schema of mathematical induction.

The second largest of the Juan Fernández Islands.

plural of Robinson-Schensted correspondence

(mathematics) A bijective correspondence between permutations and pairs of standard Young tableaux of the same shape. It has applications in combinatorics and other areas.

(mathematics) The numeric value of the integral over the positive real numbers of the reciprocal of the gamma function, F=∫₀ ᪲1/(𝛤(x))dx=2.8077702420285....

Very quickly; quicker than one expects.