RLWE/PLWE equivalence for the maximal totally real subextension of the $2^rpq$-th cyclotomic field

This work addresses a theoretical problem in lattice-based cryptography for cryptographers, but it appears incremental as it extends equivalence results to a more specific field.

The paper tackles the problem of proving the equivalence between Ring-LWE (RLWE) and Polynomial-LWE (PLWE) for a specific algebraic number field, the maximal totally real subextension of the 2^rpq-th cyclotomic field, and discusses applications in cryptanalysis.