Xavier Goaoc, Order types and their symmetries
Order types are a combinatorial classification of finite point sets used in discrete and computational geometry. This talk will give an introduction to these objects and their analogue for the …
10 events found.
Events
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Room 1501, Bldg. E6-1, KAIST
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Florent Koechlin, Uniform random expressions lack expressivity
Room B332 IBS (기초과학연구원)In computer science, random expressions are commonly used to analyze algorithms, either to study their average complexity, or to generate benchmarks to test them experimentally. In general, these approaches only …
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Dabeen Lee (이다빈), Non-smooth and Hölder-smooth submodular optimization
Room 1501, Bldg. E6-1, KAISTWe study the problem of maximizing a continuous DR-submodular function that is not necessarily smooth. We prove that the continuous greedy algorithm achieves an guarantee when the function is monotone …
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Jungho Ahn (안정호), Unified almost linear kernels for generalized covering and packing problems on nowhere dense classes
Room B332 IBS (기초과학연구원)Let $\mathcal{F}$ be a family of graphs, and let $p$ and $r$ be nonnegative integers. The $(p,r,\mathcal{F})$-Covering problem asks whether for a graph $G$ and an integer $k$, there exists …
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Hugo Jacob, On the parameterized complexity of computing tree-partitions
Zoom ID: 869 4632 6610 (ibsdimag)Following some recent FPT algorithms parameterized by the width of a given tree-partition due to Bodlaender, Cornelissen, and van der Wegen, we consider the parameterized problem of computing a decomposition. …
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Sebastian Wiederrecht, Excluding single-crossing matching minors in bipartite graphs
Room B332 IBS (기초과학연구원)By a seminal result of Valiant, computing the permanent of (0, 1)-matrices is, in general, #P-hard. In 1913 Pólya asked for which (0, 1)-matrices A it is possible to change …
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Chong Shangguan (上官冲), On the sparse hypergraph problem of Brown, Erdős and Sós
Zoom ID: 224 221 2686 (ibsecopro)For fixed integers $r\ge 3, e\ge 3$, and $v\ge r+1$, let $f_r(n,v,e)$ denote the maximum number of edges in an $n$-vertex $r$-uniform hypergraph in which the union of arbitrary $e$ …
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Seonghyuk Im (임성혁), A proof of the Elliott-Rödl conjecture on hypertrees in Steiner triple systems
Room B332 IBS (기초과학연구원)A linear $3$-graph is called a (3-)hypertree if there exists exactly one path between each pair of two distinct vertices. A linear $3$-graph is called a Steiner triple system if …
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The 2nd Workshop on Developments in Combinatorics
Zoom ID: 346 934 4087 (202209)Official website (with the abstract) https://www.ibs.re.kr/ecopro/online-workshop-developments-in-combinatorics/ Invited Speakers Nov. 28 Monday Jie Han, Beijing Institute of Technology 15:30 Seoul, 14:30 Beijing, 06:30 UK, 07:30 EU Joonkyung Lee (이준경), Hanyang University …
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Cosmin Pohoata, Convex polytopes from fewer points
Zoom ID: 224 221 2686 (ibsecopro)Finding the smallest integer $N=ES_d(n)$ such that in every configuration of $N$ points in $\mathbb{R}^d$ in general position, there exist $n$ points in convex position is one of the most …
