Operations on structures | Topology | Differential topology | Knot theory

Band sum

In geometric topology, a band sum of two n-dimensional knots K1 and K2 along an (n + 1)-dimensional 1-handle h called a band is an n-dimensional knot K such that: * There is an (n + 1)-dimensional 1-handle h connected to (K1, K2) embedded in Sn+2. * There are points and such that is attached to along . K is the n-dimensional knot obtained by this surgery. A band sum is thus a generalization of the usual connected sum of knots. (Wikipedia).

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Knot (mathematics) | Geometric topology | Connected sum | Manifold decomposition