Supplementary Material for Surface Networks

This note contains the appendices of the paper Surface Networks. A The Dirac Operator The quaternions H is an extension of complex numbers. A quaternion q 2 H can be represented in a form q = a + bi + cj + dk where a, b, c, d are real numbers and i, j, k are quaternion units that satisfy the relationship i2 = j2 = k2 = ijk = 1. vj