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math.GT2002
Unusual formulae for the Euler characteristic
Justin Roberts
Everyone knows that the Euler characteristic of a combinatorial manifold is given by the alternating sum of its numbers of simplices. It is shown that there are other linear combin…
math.GT1998★ 1 cited
Kirby calculus in manifolds with boundary
Justin Roberts
Suppose there are two framed links in a compact, connected 3-manifold (possibly with boundary, or non-orientable) such that the associated 3-manifolds obtained by surgery are homeo…