FIPS 203, Section 2.4.4. type ringElement [n]fieldElement // polyAdd adds two ringElements or nttElements. func polyAdd[T ~[n]fieldElement](a, b T) (s T) { for i := range s { s[i] = fieldAdd(a[i], b[i]) } return s } // polySub subtracts two ringElements or nttElements. func polySub[T ~[n]fieldElement](a, b T) (s T) { for i := range s { s[i] = fieldSub(a[i], b[i]) } return s } // polyByteEncode appends the 384-byte encoding of f to b. // // It implements ByteEncode₁₂, according to FIPS 203, Algorithm...