@Article{ AsCaCaMa21, author = { Ascione, Giacomo and Castorina, Daniele and Catino, Giovanni and Mantegazza, Carlo }, title = { A matrix Harnack inequality for semilinear heat equations }, journal = { Math. Engineering }, year = { 2023 }, volume = { 5 }, number = { 1 }, pages = { Paper n.003, 15 pp. }, URL = { http://cvgmt.sns.it/paper/5214/ }, note = { cvgmt preprint} }