15   // in[1] is quadrature weights, size (Q)  in build_diff()
16   const CeedScalar *w             = in[1];  in build_diff()
24       const CeedScalar(*J)[1][CEED_Q_VLA] = (const CeedScalar(*)[1][CEED_Q_VLA])in[0];  in build_diff()
33         //    1 3           2 1           -J10  J00  in build_diff()
35         const CeedScalar J10 = J[0][1][i];  in build_diff()
36         const CeedScalar J01 = J[1][0][i];  in build_diff()
37         const CeedScalar J11 = J[1][1][i];  in build_diff()
41         q_data[1][i] = qw * (J00 * J00 + J10 * J10);  in build_diff()
55             // A[k][j] = J[j+1][k+1]*J[j+2][k+2] - J[j+1][k+2]*J[j+2][k+1]  in build_diff()
57 …J[(k + 1) % 3][(j + 1) % 3][i] * J[(k + 2) % 3][(j + 2) % 3][i] - J[(k + 2) % 3][(j + 1) % 3][i] *…  in build_diff()
62 … const CeedScalar qw = w[i] / (J[0][0][i] * A[0][0] + J[0][1][i] * A[0][1] + J[0][2][i] * A[0][2]);  in build_diff()
67         // 5 1 3  in build_diff()
69         q_data[0][i] = qw * (A[0][0] * A[0][0] + A[0][1] * A[0][1] + A[0][2] * A[0][2]);  in build_diff()
70         q_data[1][i] = qw * (A[1][0] * A[1][0] + A[1][1] * A[1][1] + A[1][2] * A[1][2]);  in build_diff()
71         q_data[2][i] = qw * (A[2][0] * A[2][0] + A[2][1] * A[2][1] + A[2][2] * A[2][2]);  in build_diff()
72         q_data[3][i] = qw * (A[1][0] * A[2][0] + A[1][1] * A[2][1] + A[1][2] * A[2][2]);  in build_diff()
73         q_data[4][i] = qw * (A[0][0] * A[2][0] + A[0][1] * A[2][1] + A[0][2] * A[2][2]);  in build_diff()
74         q_data[5][i] = qw * (A[0][0] * A[1][0] + A[0][1] * A[1][1] + A[0][2] * A[1][2]);  in build_diff()
84   // in[0], out[0] solution gradients with shape [dim, 1, Q]  in apply_diff()
85   // in[1] is quadrature data with shape [num_components, Q]  in apply_diff()
86   const CeedScalar(*q_data)[CEED_Q_VLA] = (const CeedScalar(*)[CEED_Q_VLA])in[1];  in apply_diff()
89     case 1: {  in apply_diff()
103         // 2 1  in apply_diff()
106             {q_data[2][i], q_data[1][i]}  in apply_diff()
110 …for (int j = 0; j < 2; j++) vg[j][i] = (ug[0][i] * dXdxdXdx_T[0][j] + ug[1][i] * dXdxdXdx_T[1][j]);  in apply_diff()
121         // 5 1 3  in apply_diff()
125             {q_data[5][i], q_data[1][i], q_data[3][i]},  in apply_diff()
130 …t j = 0; j < 3; j++) vg[j][i] = (ug[0][i] * dXdxdXdx_T[0][j] + ug[1][i] * dXdxdXdx_T[1][j] + ug[2]…  in apply_diff()