Nonconstant hexagon relations and their cohomology
arXiv:1812.10072 · doi:10.1007/s11005-020-01338-1
Abstract
A construction of hexagon relations - algebraic realizations of four-dimensional Pachner moves - is proposed. It goes in terms of "permitted colorings" of 3-faces of pentachora (4-simplices), and its main feature is that the set of permitted colorings is nonconstant - varies from pentachoron to pentachoron. Further, a cohomology theory is formulated for these hexagon relations, and its nontriviality is demonstrated on explicit examples.
26 pages; v2: improvements in Section 6, expression for 4-cocycle corrected
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