A person who remains, typically when most others leave

plural of remainee

(number theory) A theorem stating that, if one knows the remainders of the Euclidean division of an integer n by several integers, then one can determine uniquely the remainder of the division of n by the product of these integers, under the condition that the divisors are pairwise coprime.

A dot, line, or other mark made with a pen onto paper.

(law) The part left over (especially of an estate).