Polynomial Congruence

[@martinhazard2025]

Wrong in 0:00 Zn is not equal Z/nZ, only are isomorphims

[@katherinekelm7439]

It depends on how one defines Z_n. In most books Z_n is defined as the set of all congruence classes (mod n). So the class [k] in Z_n is exactly the coset k + nZ in Z/(nZ).