The classical H surfaces of H. A. Schwarz form a 1-parameter family of triply
periodic minimal surfaces (TPMS) that are usually described as close relatives
to his more famous P surface. However, a crucial distinction between these
surfaces is that the P surface belongs to a 5-dimensional smooth family of
embedded TPMS of genus three discovered by W. Meeks, while the H surfaces are
among the few known examples outside this family. We construct a 2-parameter
family of embedded TPMS of genus three that contains the H family and meets the
Meeks family. In particular, we prove that H surfaces can be deformed
continuously within the space of TPMS of genus three into Meeks surfaces.Comment: 20 pages, 11 figures. arXiv admin note: text overlap with
arXiv:1804.0144