Coord

using syten::IPEPS::Coord = typedef std::array<int, 2>

Coordinate type used for square IPEPS lattices.

(0,0) is located in the lower left corner with (0,1) on the site behind (or above) the first site and (1,0) on the site to the right of the first site. (-W,0) is the site to the left of the first site and (0,-D) the site in front of (or below) the first site, with W and D unit cell width and depth respectively.