#include <triqs/arrays.hpp>
using triqs::arrays::array;
using triqs::clef::placeholder;
int main() {
 placeholder<0> i_;
 placeholder<1> j_;
 array<double, 2> A(2, 2), B(2, 2);

 A(i_, j_) << i_ + 2 * j_;
 B(i_, j_) << A(j_, i_) / 2;

 std::cout << "A = " << A << std::endl;
 std::cout << "B = " << B << std::endl;
}