Sufficient conditions are obtained so that a weak subsolution of $(0.1)$, bounded from above on the parabolic boundary of the cylinder $Q$, turns out to be bounded from above in $Q$.
@article{118683, author = {Salvatore Bonafede}, title = {On maximum principle for weak subsolutions of degenerate parabolic linear equations}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {35}, year = {1994}, pages = {417-430}, zbl = {0808.35065}, mrnumber = {1307270}, language = {en}, url = {http://dml.mathdoc.fr/item/118683} }
Bonafede, Salvatore. On maximum principle for weak subsolutions of degenerate parabolic linear equations. Commentationes Mathematicae Universitatis Carolinae, Tome 35 (1994) pp. 417-430. http://gdmltest.u-ga.fr/item/118683/
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