Let R be the category of commutative rings with unity and unity-preserving homomorphisms, and let Pi be a small algebraic theory, i.e., an algebraic theory with a rank in the sense of Linton. The ...

Let m > 1, r, s be fixed non-negative integers, and let R be a ring with unity 1 in which for every x in R there exist polynomials f(X), p(X), q(X) ∈ ℤ[X ...