9{
   13 
   15  t2(
i, 
k) = t2_5(
i, 
j) * t2_4(
j, 
k);
 
   16 
   17  for(int ii = 0; ii < 3; ++ii)
   18    for(int kk = 0; kk < 3; ++kk)
   19      {
   21          t2(ii, kk)
   22            - (t2_5(ii, 0) * t2_4(0, kk) + t2_5(ii, 1) * t2_4(1, kk)
   23               + t2_5(ii, 2) * t2_4(2, kk) + t2_5(ii, 3) * t2_4(3, kk)),
   24          "T2(i,j)*T2(j,k)(" + std::to_string(ii) + "," + std::to_string(kk)
   25            + ")");
   26      }
   27}
FTensor::Index< 'i', SPACE_DIM > i
FTensor::Index< 'j', 3 > j
FTensor::Index< 'k', 3 > k
void test_for_zero(const T &t, const std::string &s)