A system of numerals represented by letters of the Greek alphabet. These are used for special purposes, where in English Roman numerals might be used. The numerals are formed by the addition of a mark to the upper or lower case letter, i.e. Γ΄, δ΄, θ΄. In addition to the usual Greek letters three additional symbols are used: stigma (ϛ), koppa (ϟ) and sampi (ϡ); stigma (Ϛ or ϛ) may also be represented by ΣΤ΄ or στ΄.

One of the Greek numerals. A symbol formed from one or more of the letters of the Greek alphabet which has been modified by the addition of a mark, thus: Δ' θ'. These are used to numerate monarchs, chapters, etc as Roman numerals are used in English.

(mathematics) The study of algorithms to solve mathematical problems concerning continuous sets of values (such as the real numbers, complex numbers or vector spaces).

plural of Arabic numeral

(mathematics) Either of two related numeration systems based on continued fractions: a non-standard positional numeral system for integers, and a non-integer representation of real numbers.

(grammar) A word used to represent an ordinal number.

plural of Suzhou numeral

plural of numeric complement

A representation of a natural number using lambda notation.

plural of Church numeral