%0 Journal Article %T Adding handles to the helicoid %A David A. Hoffman %J Mathematics %D 1993 %I arXiv %X There exist two new embedded minimal surfaces, asymptotic to the helicoid. One is periodic, with quotient (by orientation-preserving translations) of genus one. The other is nonperiodic of genus one. %U http://arxiv.org/abs/math/9307226v1