Project description
Breaking down complexity in homotopy theory
Stable homotopy theory is a mathematical framework that generalises algebra using spectra – advanced versions of numbers or groups. Spectra are important because they help describe fundamental properties of shapes, spaces and numbers, such as how rings behave or how manifolds can be classified. A key idea in this theory is the chromatic approach, which breaks down problems into simpler pieces using intermediate steps between two values (0 and p). The ERC-funded AlgChrom project will explore these intermediate steps using new mathematical tools and ideas from algebraic geometry. The proposed research will seek to solve big problems in the field such as the chromatic redshift conjecture and improve computations in Galois, Picard and Brauer groups.
Objective
Stable homotopy theory provides a powerful framework for the study of algebra in the homotopy coherent setting. Its central notion is that of a spectrum, which is the homotopical generalization of an abelian group. Spectra appear naturally in a wide range of mathematical fields from number theory to differential topology, as they encode in a highly structured fashion various fundamental invariants, such as the algebraic K-theory groups of a ring and the cobordism classes of manifolds. The tools of stable homotopy theory have thus found remarkable applications in both algebra and topology, as well as in symplectic geometry, mathematical physics and more.
The prevailing, and highly successful, paradigm in stable homotopy theory is the chromatic approach, which gives rise to an infinite family of “intermediate” characteristics interpolating between 0 and p, allowing one to implement local-to-global methods in homotopical settings. In this proposal, I shall describe several interrelated projects, with two unifying themes: The study of the intermediate characteristics using higher semiadditivity, and the import of ideas and tools from algebraic geometry to study both the local and global aspects of the chromatic approach.
The preliminary results already provide significant advances on some of the central problems in stable homotopy theory, such as the chromatic redshift conjecture in algebraic K-theory, the construction of E∞-orientations, and the chromatic splitting conjecture. Furthermore, they facilitate partial computations of the Galois, Picard and Brauer groups in the intermediate characteristics.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences mathematics pure mathematics topology
- natural sciences mathematics pure mathematics algebra
- natural sciences mathematics pure mathematics geometry
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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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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.1 - European Research Council (ERC)
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Call for proposal
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(opens in new window) ERC-2022-COG
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91904 Jerusalem
Israel
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