TY - JOUR AU - L. Yu. Kolotilina TI - SSDD matrices and relations with other subclasses of nonsingular $\mathcal H$-matrices JO - Zapiski Nauchnykh Seminarov POMI PY - 2024 SP - 57 EP - 88 VL - 534 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZNSL_2024_534_a2/ LA - ru ID - ZNSL_2024_534_a2 ER -