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- W2963318504 abstract "We study $Q$-polynomial distance-regular graphs from the point of view of what we call descendents, that is to say, those vertex subsets with the property that the width $w$ and dual width $w^*$ satisfy $w+w^*=d$, where $d$ is the diameter of the graph. We show among other results that a nontrivial descendent with $wge 2$ is convex precisely when the graph has classical parameters. The classification of descendents has been done for the 5 classical families of graphs associated with short regular semilattices. We revisit and characterize these families in terms of posets consisting of descendents, and extend the classification to all of the 15 known infinite families with classical parameters and with unbounded diameter." @default.
- W2963318504 created "2019-07-30" @default.
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- W2963318504 date "2011-08-19" @default.
- W2963318504 modified "2023-09-28" @default.
- W2963318504 title "Vertex Subsets with Minimal Width and Dual Width in $Q$-Polynomial Distance-Regular Graphs" @default.
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- W2963318504 doi "https://doi.org/10.37236/654" @default.
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