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Local vs Global Properties of Large Discrete Structures

Objective

The PI proposes to study a variety of open problems in extremal combinatorics, an area that deals with the asymptotic relations between various parameters of large discrete structures. This area has grown tremendously in the past few decades, in depth and in breadth, and supplied many spectacular results that affected various other areas of mathematics, such as number theory, group theory, probability theory, information theory and theoretical computer science.

A common theme in many of the problems the PI will investigate is the relation between local and global properties of various discrete structures. For example, suppose a graph contains few copies of some fixed graph; what can one infer from this simple local restriction about other more global properties of this object? Perhaps surprisingly, many of the outstanding open problems in extremal combinatorics can be cast in this manner. One such problem is the celebrated hypergraph removal lemma. An important goal of this project is to obtain the first primitive recursive bounds for this fundamental problem. Another family of such problems are motivated by questions in theoretical computer science and ask to develop fast algorithms for deciding if a discrete structure satisfies some predetermined property. The PI will develop a unifying theory for such problems using various combinatorial tools introduced in the past few years. Another set of problems ask to establish that hypergraphs excluding certain types of sub-structures, possess surprisingly good Ramsey-type properties.

The common thread going through the above problems is Szemeredi's regularity lemma, which is one of the most powerful tools in extremal combinatorics. An important goal of this project is to find new applications of the graph and hypergraph versions this lemma, but more importantly, to develop new efficient variants of the lemma, tailored for specific applications, that would allow us to settle the problems discussed in this proposal.

Fields of science (EuroSciVoc)

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Keywords

Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)

Programme(s)

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Topic(s)

Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.

Funding Scheme

Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.

ERC-COG - Consolidator Grant

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Call for proposal

Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.

(opens in new window) ERC-2019-COG

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Host institution

TEL AVIV UNIVERSITY
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.

€ 1 684 375,00
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.

€ 1 684 375,00

Beneficiaries (1)

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