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From Geometry to Combinatorics and Back: Escaping the Curse of Dimensionality

Project description

Study could offer new insight on problems central to graphs and hypergraphs

Combinatorics is primarily concerned with problems of selection, arrangement and operation within discrete systems. It is closely related to many other areas of mathematics and has many applications ranging from logic to statistical physics, evolutionary biology and computer science. The EU-funded GeoScape project aims to tackle certain problems for large classes of graphs and hypergraphs arising in geometry and algebra. These fundamental structures escape the ‘curse of dimensionality’: they can either be embedded in a bounded-dimensional space, or have a small VC-dimension, or a short algebraic description. The insight gained could lead closer to the solution of certain classical problems, such as the Erdős-Hajnal conjecture, and to the design of improved algorithms for clustering and property testing in huge graphs.

Objective

"Combinatorics is a fundamental mathematical discipline whose study has experienced unprecedented growth during the past few decades. Its rapid development can be partially explained by spectacular applications of extremal combinatorics in additive number theory, information theory, theoretical computer science, and elsewhere. Asymptotic results in extremal and probabilistic combinatorics have proved to be powerful tools in the structural and algorithmic analysis of huge networks such as the internet graph, brain maps, social networks, and integrated circuits. We have deep, well developed algebraic, topological, and probabilistic techniques to tackle some basic problems of modern combinatorics, but many classic Ramsey-, Turn-, and Szemerdi-type questions remained open.
The main goal of the proposed work is to attack some hard problems for large classes of graphs and hypergraphs arising in geometric, algebraic, and practical applications. These structures escape the ""curse of dimensionality: they can be embedded in a bounded-dimensional space, or they have small VC-dimension, or a short algebraic description. The work of the principal investigator, his collaborators and students has played a significant role in the introduction of modern combinatorial tools in geometry. In the present project, he aims to explore the reverse direction: to develop and apply geometric techniques to settle important special cases of notoriously difficult combinatorial problems on (1) bounded degree semi-algebraic graphs and hypergraphs, (2) graphs and hypergraph of bounded VC-dimension, (3) ordered graphs, 0-1 matrices, and graphs embedded in the plane or in other surfaces. Progress on the problems described in the proposal is expected to lead closer to the solution of some classical problems such as the Erds-Hajnal conjecture, the Danzer-Rogers conjecture, the Schur-Erds problem, and to the development of improved algorithms for clustering and property testing in huge graphs."

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Topic(s)

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Funding Scheme

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ERC-ADG - Advanced Grant

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Call for proposal

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(opens in new window) ERC-2019-ADG

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Host institution

HUN-REN RENYI ALFRED MATEMATIKAI KUTATOINTEZET
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 2 009 433,75
Address
REALTANODA STREET 13-15
1053 Budapest
Hungary

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Region
Közép-Magyarország Budapest Budapest
Activity type
Other
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Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 2 009 433,75

Beneficiaries (1)

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