Epsilon : 1e-12
FEEngine [
 + id                : my_fem
 + element dimension : 2
 + mesh [
  Mesh [
   + id                : mesh
   + spatial dimension : 2
   + nodes [
    Array<double> [
     + id             : mesh:coordinates
     + size           : 41
     + nb_component   : 2
     + allocated size : 2000
     + memory size    : 31.25KiByte
     + values         : {{0, 0}, {1, 0}, {1, 1}, {0, 1}, {0.5, 0}, {0.25, 0}, {0.75, 0}, {1, 0.5}, {1, 0.25}, {1, 0.75}, {0.5, 1}, {0.75, 1}, {0.25, 1}, {0, 0.5}, {0, 0.75}, {0, 0.25}, {0.5, 0.5}, {0.25, 0.75}, {0.75, 0.75}, {0.75, 0.25}, {0.25, 0.25}, {0.125, 0.875}, {0.375, 0.875}, {0.125, 0.125}, {0.125, 0.375}, {0.875, 0.875}, {0.875, 0.625}, {0.875, 0.125}, {0.625, 0.125}, {0.25, 0.5}, {0.375, 0.625}, {0.125, 0.625}, {0.5, 0.75}, {0.625, 0.625}, {0.625, 0.875}, {0.375, 0.375}, {0.75, 0.5}, {0.5, 0.25}, {0.375, 0.125}, {0.625, 0.375}, {0.875, 0.375}}
    ]
   + connectivities [
    ElementTypeMapArray<unsigned int> [
        (not_ghost:_point_1) [
       Array<unsigned int> [
        + id             : mesh:connectivities:_point_1
        + size           : 4
        + nb_component   : 1
        + allocated size : 2000
        + memory size    : 7.81KiByte
        + values         : {{0}, {1}, {2}, {3}}
       ]
         ]
        (not_ghost:_segment_3) [
       Array<unsigned int> [
        + id             : mesh:connectivities:_segment_3
        + size           : 8
        + nb_component   : 3
        + allocated size : 2000
        + memory size    : 23.44KiByte
        + values         : {{0, 4, 5}, {4, 1, 6}, {1, 7, 8}, {7, 2, 9}, {2, 10, 11}, {10, 3, 12}, {3, 13, 14}, {13, 0, 15}}
       ]
         ]
        (not_ghost:_triangle_6) [
       Array<unsigned int> [
        + id             : mesh:connectivities:_triangle_6
        + size           : 16
        + nb_component   : 6
        + allocated size : 2000
        + memory size    : 46.88KiByte
        + values         : {{3, 17, 10, 21, 22, 12}, {0, 20, 13, 23, 24, 15}, {2, 18, 7, 25, 26, 9}, {1, 19, 4, 27, 28, 6}, {13, 16, 17, 29, 30, 31}, {10, 17, 16, 22, 30, 32}, {10, 16, 18, 32, 33, 34}, {13, 20, 16, 24, 35, 29}, {7, 18, 16, 26, 33, 36}, {4, 16, 20, 37, 35, 38}, {4, 19, 16, 28, 39, 37}, {7, 16, 19, 36, 39, 40}, {0, 4, 20, 5, 38, 23}, {3, 13, 17, 14, 31, 21}, {1, 7, 19, 8, 40, 27}, {2, 10, 18, 11, 34, 25}}
       ]
         ]
    ]
   ]
   GroupManager [
   ]
  ]
 ]
]

Array<double> [
 + id             : grad_on_quad
 + size           : 48
 + nb_component   : 4
 + allocated size : 48
 + memory size    : 1.50KiByte
 + values         : {{13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}, {13, 11, 23, 7}}
]