Project description
Study deepens understanding of the interplay between finite and infinite combinatorics
Funded by the Marie Skłodowska-Curie Actions programme, the CHROMPART project aims to develop the theory of partition calculus on graphs, digraphs and hypergraphs with emphasis on interactions between one- and multi-dimensional relations. Researchers will investigate ramification arguments between Ramsey theory results of varying dimensions. In particular, they will study whether graphs with uncountable chromatic number necessarily satisfy the same higher-dimensional negative partition relations as uncountable complete graphs and will relate this to the existence of orientations with large dichromatic numbers and partition relations on digraphs. Lastly, researchers will explore the existence of oscillation maps on the obligatory hypergraph associated to a graph with uncountable chromatic number.
Objective
Our main goal is to develop the theory of partition calculus on graphs, digraphs and hypergraphs with emphasis on interactions between one-and multi-dimensional relations. Such global characteristics crucially depend on local, often finitary structural properties. This places our project at the meeting point of finite and infinite combinatorics with logic and set theory. Some of the most important questions that motivate our investigations were first raised by P. Erdős and A. Hajnal in the 1960s. Their problems still guide research across finite and infinite combinatorics including the most recent works of R. Diestel, N. Hindman, P. Komjáth, C. Thomassen, S. Todorcevic, and S. Shelah. Our main objective is to investigate ramification arguments between Ramsey-results of varying dimensions. In fact, (1) we study if graphs with uncountable chromatic number necessarily satisfy the same higher-dimensional negative partition relations as uncountable complete graphs. We relate this theme to (2) the existence of orientations with large dichromatic number and partition relations on digraphs. Lastly, we explore a novel concept, (3) the existence of oscillation maps on the obligatory hypergraph associated to a graph with uncountable chromatic number. Our program will be carried out through solving specific, often well-known open problems that are central to these themes. We aim to study both the purely combinatorial and the deep foundational issues that underlie these questions. Hence, we will complement the use of advanced forcing techniques from set theory (such as mixed side-condition methods and new iteration preservation theorems) with novel combinatorial tools, such as minimal walks, oscillation maps and various ZFC construction scheme techniques. We expect our research to produce new methods of wide impact and a significantly deeper understanding of the interactions of finite and infinitary combinatorics.
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)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions
MAIN PROGRAMME
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H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility
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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.
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.
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.
MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)
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Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) H2020-MSCA-IF-2018
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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.
NR4 7TJ Norwich
United Kingdom
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.