Inca Foams
arXiv:1509.01284 · doi:10.1142/S0218216517500055
Abstract
We study a certain class of embedded two-foams that arise from gluing discs into ribbon torus knots along nonintersecting torus meridians. We exhibit several equivalent diagrammatic formalisms for these objects and identify several of their invariants, including a unique prime decomposition.
This expands, revises, and replaces a part of arXiv:1404.2863