Source: wikibot/haynsworth-inertia-additivity-formula
= Haynsworth inertia additivity formula
{wiki=Haynsworth_inertia_additivity_formula}
Haynsworth's inertia additivity formula provides a way to compute the inertia (the number of positive, negative, and zero eigenvalues) of a block matrix based on the inertia of its individual blocks and their interactions.