Ní ìmọ̀ ẹ̀rọ, and àlàyé ìdúróṣinṣin, à ń pe square matrix A {\displaystyle A} ní ìdúróṣinṣin matrix (tàbí nígbàmíràn ní Hurwitz matrix) tí gbogbo eigenvalue ti A {\displaystyle A} ní apá òdì,
Ni imo ero, and alaye idurosinsin, a n pe square matrix A {\displaystyle A} ni idurosinsin matrix (tabi nigbamiran ni Hurwitz matrix) ti gbogbo eigenvalue ti A {\displaystyle A} ni apa odi,