The Class Group for Quadratic Forms — Allen Hatcher
Mathematics — Number Theory · primes-represented-by-symmetric-forms
Problem
For a fixed discriminant Δ consider the set SΔ of primes that do not divide the conductor and are represented by primitive forms with mirror symmetry. Show that numbers that are products of primes in SΔ are represented by at most one form of discriminant Δ, up to equivalence, and this form has mirror symmetry.