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arxiv: math/0512320 · v5 · pith:B4PC3HHUnew · submitted 2005-12-14 · 🧮 math.GT · hep-th· math-ph· math.MP

A new invariant associated with decompositions of manifolds

classification 🧮 math.GT hep-thmath-phmath.MP
keywords invariantmanifoldsassociatedboundariescompactboundaryconnecteddecomposition
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We introduce a new topological invariant, which is a nonnegative integer, of compact manifolds with boundaries associated with a kind of decomposition of them. Let M and N be m-dimensional compact connected manifolds with boundaries. The new invariant of any boundary union of M and N is less than or equal to that of M (resp. that of N).

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