Synonym of split-complex number

plural of hyperbolic number

plural of ideal number

(number theory) An algebraic integer that represents an ideal in the ring of integers of a number field.

(mathematics, chiefly historical) Synonym of pi, particularly the 35-decimal approximation discovered by Ludolph van Ceulen

plural of Motzkin number

(mathematics) For a given number n, the number of different ways of drawing non-intersecting chords between n points on a circle (not necessarily touching every point by a chord). They have diverse applications in geometry, combinatorics, and number theory.

(mathematics) The number of possible paths from the southwest corner (0, 0) of a rectangular grid to the northeast corner (m, n), using only single steps north, northeast, or east.

plural of Delannoy number

plural of Narayana number