A set of gender-neutral third person singular pronouns created by Michael Spivak, a mathematician who used them in his textbooks, which include Comprehensive Introduction to Differential Geometry and Calculus on Manifolds. They are used in a generic setting when someone's gender is unknown - "the reader" is an example. Spivak pronouns are sometimes used online by individuals who do not wish their real life gender to be known.

            First Person  Second Person  Third Person

Subject          I             you            e

Object           me            you            em

Possessive    my/mine       your/yours     eir/eirs

Reflexive      myself       yourself        emself