subtract()

void M2::ARingGFM2::subtract ( elem & result, elem a, elem b ) const

inline

Definition at line 292 of file aring-m2-gf.hpp.

  {
    result = a;
    if (b == 0) return;
    elem c = modulus_add(b, mGF.minusOne(), mGF.orderMinusOne());  // c = -b
    add(result, a, c);
  }

References add(), mGF, modulus_add(), and result().

Referenced by subtract_multiple().