Each exceptional layer of the overlap is `R`-linearly isomorphic to the Laurent polynomial ring `(R/(t,x))[Z, Z⁻¹]`, the monomial `r Z^ℓ` corresponding to the layer class of `r · z^ℓ`.

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Each exceptional layer of the overlap is `R`-linearly isomorphic to the Laurent polynomial ring `(R/(t,x))[Z, Z⁻¹]`, the monomial `r Z^ℓ` corresponding to the layer class of `r · z^ℓ`. · Prove2Me