Staircase convex results for a certain class of orthogonal polytopes

Verfasser / Beitragende:
[Marilyn Breen]
Ort, Verlag, Jahr:
2015
Enthalten in:
Aequationes mathematicae, 89/4(2015-08-01), 1213-1221
Format:
Artikel (online)
ID: 605508828
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024 7 0 |a 10.1007/s00010-014-0294-2  |2 doi 
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100 1 |a Breen  |D Marilyn  |u The University of Oklahoma, OK, 73019, Norman, USA  |4 aut 
245 1 0 |a Staircase convex results for a certain class of orthogonal polytopes  |h [Elektronische Daten]  |c [Marilyn Breen] 
520 3 |a Let $${\mathcal{C}}$$ C be a finite family of distinct boxes in $${\mathbb{R}^{d}}$$ R d whose intersection graph is a block graph, and let $${S = \cup \{C :C {\rm in} \mathcal{C}\}}$$ S = ∪ { C : C in C } . Let $${T \subseteq S}$$ T ⊆ S . If for every a, b in T there is an a − b staircase in S, then T lies in a staircase convex union of boxes $${\cup \{B : B {\rm in} \mathcal{B}\}}$$ ∪ { B : B in B } , where each B i in $${\mathcal{B}}$$ B is a subset of some associated box C i in $${\mathcal{C}}$$ C and where the intersection graph of $${\mathcal{B}}$$ B is a connected block graph. This result, in turn, allows us to obtain for set S analogues of established theorems concerning staircase convex sets and their unions in $${\mathbb{R}^{d}}$$ R d . Moreover, when S is staircase starshaped, then its staircase kernel will be staircase convex. 
540 |a Springer Basel, 2014 
690 7 |a Orthogonal polytopes  |2 nationallicence 
690 7 |a staircase convex sets  |2 nationallicence 
690 7 |a staircase starshaped sets  |2 nationallicence 
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950 |B NATIONALLICENCE  |P 100  |E 1-  |a Breen  |D Marilyn  |u The University of Oklahoma, OK, 73019, Norman, USA  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Aequationes mathematicae  |d Springer Basel  |g 89/4(2015-08-01), 1213-1221  |x 0001-9054  |q 89:4<1213  |1 2015  |2 89  |o 10