Definitions

1. proper noun

A French surname, notably borne by Henri Poincaré, a French mathematician and physicist.

“Henri Poincaré made significant contributions to the field of topology.”

2. noun

A Poincaré conjecture, a mathematical hypothesis proposed by Henri Poincaré.

“The Poincaré conjecture was finally proven by Grigori Perelman in 2003.”

3. noun

A Poincaré transformation, a linear transformation used in mathematical physics to describe spacetime.

“The Poincaré transformation is essential in special relativity theory.”