Ziyuan Zhang

Polynomial Identities Separating CD4 from CD5: Minimal Degree Eight, the Complete Octic Relative Cocharacter, and the Nonic Sign Cascade

This preprint establishes pure-multiplication polynomial identities separating the standard Cayley-Dickson inclusion CD4 from CD5 and proves that degree eight is minimal, with an explicit separator and nonzero CD5 witness. The exact octic relative cocharacter has dimension 800: s...