denseCancelFromSparse() [1/2]

template<typename RingType>

void ConcreteVectorArithmetic< RingType >::denseCancelFromSparse ( ElementArray & dense, const ElementArray & sparse, const Range< const int > & comps ) const

inline

Definition at line 240 of file VectorArithmetic.hpp.

  {
    // ASSUMPTION: svec[0] == 1.
    auto& dvec = * elementArray(dense);
    auto& svec = * elementArray(sparse);
 
    typename RingType::Element a(*mRing,dvec[comps[0]]);
    for (int i=1; i < comps.size(); ++i)
      mRing->subtract_multiple(dvec[comps[i]], a, svec[i]);
    mRing->set_zero(dvec[comps[0]]);
  }

References dvec(), elementArray(), mRing, and Range< T >::size().