2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47949In the following short paper we list some useful results concerning determinants and inverses of matrices. First we show, how to calculate determinants of $d \times d$ matrices, if their traces are known. As a next step $4 \times 4$ matrices are expressed in terms of Dirac covariants. The third step is the calculation of the corresponding inverse matrices in terms of Dirac covariants.11 pages, 1 figureHigh Energy Physics - Phenomenologytext