Ti a n pe bawon labebe  re ni Hurwitz determinants.Idurosinsin Hurwitz matrices Ni imo ero, ati alaye idurosinsin, a n pe square matrix  ni idurosinsin matrix (tabi nigbamiran ni Hurwitz matrix) ti gbogbo eigenvalue ti  ni apa odi,  fun ikookan eigenvalue .. 
Ìgbà tí ó gbọ́ ìròyìn nípa ikú Duchesne ni ó sẹ̀sẹ̀ padà lọ fẹ́ ọmọ rẹ̀.. 