arXiv:2610.40869v1 Announce Type: new Abstract: We propose a phenotype-structure form of the Cahn-Hilliard equation with degenerate mobility and analyze the existence of weak solutions for this new variant. This model is motivated by tumor modeling as multiple phenotypes co-exist within the same tumor and are believed to constitute a continuum of phenotypes. The originality of the model lies in its ability to consider an infinite number of phases and it allows for spatial interactions between phenotypes as well as transport in the phenotypic space, i.e., mutations.
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