2009
DOI: 10.1007/s00454-009-9187-x
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Applications of Klee’s Dehn–Sommerville Relations

Abstract: We use Klee's Dehn-Sommerville relations and other results on face numbers of homology manifolds without boundary to (i) prove Kalai's conjecture providing lower bounds on the f -vectors of an even-dimensional manifold with all but the middle Betti number vanishing, (ii) verify Kühnel's conjecture that gives an upper bound on the middle Betti number of a 2k-dimensional manifold in terms of k and the number of vertices, and (iii) partially prove Kühnel's conjecture providing upper bounds on other Betti numbers … Show more

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Cited by 32 publications
(58 citation statements)
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“…For the case of closed manifolds, the last decade of research led to tremendous progress on this question, see, for instance, [2,3,19,22,23,25,27,28,29,30,37,38]. On the other hand, face numbers of manifolds with boundary remained a big mystery, and very few papers even touched on this subject, see [9,14,25,28]. At present there is not even a conjecture for characterizing the set of f -vectors of balls of dimension six and above, see [14].…”
Section: Introductionmentioning
confidence: 99%
“…For the case of closed manifolds, the last decade of research led to tremendous progress on this question, see, for instance, [2,3,19,22,23,25,27,28,29,30,37,38]. On the other hand, face numbers of manifolds with boundary remained a big mystery, and very few papers even touched on this subject, see [9,14,25,28]. At present there is not even a conjecture for characterizing the set of f -vectors of balls of dimension six and above, see [14].…”
Section: Introductionmentioning
confidence: 99%
“…In particular, face enumeration on manifolds with boundary is closely related to face enumeration on spaces with isolated singularities. For a specific example see [21,Theorem 5.1].…”
Section: Introductionmentioning
confidence: 99%
“…It seems, the version with the boundary goes back to Macdonald [26] and was rediscovered a number of times. We refer to [30] for the most general version of the equations, various applications, and further references.…”
Section: 8mentioning
confidence: 99%