The relation between toric geometry, theory of local blow-ups and ramification theory and their applications in valuation theory

• Grant number: 17/17835-9
• Support Opportunities: Research Grants - Young Investigators Grants
• Start date: March 01, 2018
• End date: February 29, 2024
• Field of knowledge: Physical Sciences and Mathematics - Mathematics - Algebra
• Principal Investigator: Josnei Antonio Novacoski
• Grantee: Josnei Antonio Novacoski
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• City of the host institution: São Carlos
• Associated research grant(s): 22/14876-4 - The defect of an extension of valued fields, AV.EXT
• Associated scholarship(s): 20/05148-0 - The valuative tree, BP.MS; 18/23727-7 - Topologies on spaces of valuations, BP.MS; 18/04068-2 - The relation between toric geometry, theory of local blow-ups and ramification theory and their applications to valuation theory, BP.JP

Abstract

The main goal of this research project is to expand the knowledge of the relation between toric geometry, theory of local blow-ups and ramification theory. The motivation for this study is the common applications of these areas to valuation theory, more specifically to the local uniformization problem. The local uniformization problem (that can be seen as a local version of resolution of singularities) is open for valuations centered on algebraic varieties over a field of positive characteristic. However, in the recent years, many programs to solve this problem have gainned strength. Three of the most important are those developed by Teissier (using toric geometry), by Spivakovsky (using theory of local blow-ups) and by Knaf and Kuhlmann (using ramification theory). The problems which will be studied in this project will allow us to adapt strategies from each of these programs to the others. This will provide new results in the problem of local uniformization in positive characteristic. (AU)

Scientific publications

(14)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

NOVACOSKI, JOSNEI. On MacLane-Vaquie key polynomials. Journal of Pure and Applied Algebra, v. 225, n. 8, AUG 2021. (17/17835-9)

KUHLMANN, FRANZ-VIKTOR. Valued fields with finitely many defect extensions of prime degree. JOURNAL OF ALGEBRA AND ITS APPLICATIONS, v. 21, n. 03, p. 18-pg., 2022-03-01. (17/17835-9)

NOVACOSKI, JOSNEI. Key polynomials and minimal pairs. Journal of Algebra, v. 523, p. 1-14, APR 1 2019. (17/17835-9, 15/23409-7)

DE MORAES, MICHAEL; NOVACOSKI, JOSNEI. Perron transforms and Hironaka's game. Journal of Algebra, v. 563, p. 100-110, SEP 1 2020. (17/17835-9)

NART, ENRIC; NOVACOSKI, JOSNEI. Geometric parametrization of valuations on a polynomial ring in one variable. MATHEMATISCHE ZEITSCHRIFT, v. 304, n. 4, p. 21-pg., 2023-08-01. (21/11246-7, 17/17835-9)

NOVACOSKI, J. A.; SILVA DE SOUZA, C. H.. On truncations of valuations. Journal of Pure and Applied Algebra, v. 226, n. 6, JUN 2022. (17/17835-9, 20/05148-0)

NART, ENRIC; NOVACOSKI, JOSNEI. The defect formula. ADVANCES IN MATHEMATICS, v. 428, p. 44-pg., 2023-06-12. (21/11246-7, 17/17835-9)

NOVACOSKI, JOSNEI; SILVA DE SOUZA, CAIO HENRIQUE. Parametrizations of subsets of the space of valuations. MATHEMATISCHE ZEITSCHRIFT, v. 307, n. 4, p. 25-pg., 2024-08-01. (21/13531-0, 17/17835-9)

NART, ENRIC; NOVACOSKI, JOSNEI. Minimal limit key polynomials. JOURNAL OF THE LONDON MATHEMATICAL SOCIETY-SECOND SERIES, v. 111, n. 5, p. 34-pg., 2025-05-01. (17/17835-9)

NOVACOSKI, JOSNEI. Generators for extensions of valuation rings. Journal of Pure and Applied Algebra, v. 229, n. 2, p. 13-pg., 2025-02-01. (17/17835-9)

BARNABE, M. S.; NOVACOSKI, J.; SPIVAKOVSKY, M.. On the structure of the graded algebra associated to a valuation. Journal of Algebra, v. 560, p. 667-679, OCT 15 2020. (17/17835-9)

BARNABE, MATHEUS DOS SANTOS; NOVACOSKI, JOSNEI. Valuations on K[x] approaching a fixed irreducible polynomial. Journal of Algebra, v. 592, p. 100-117, FEB 15 2022. (17/17835-9)

CUTKOSKY, STEVEN DALE; NOVACOSKI, JOSNEI. Essentially finite generation of valuation rings in terms of classical invariants. Mathematische Nachrichten, v. 294, n. 1, p. 15-37, JAN 2021. (17/17835-9)

DE MORAES, MICHAEL; NOVACOSKI, JOSNEI. Limit key polynomials as p-polynomials. Journal of Algebra, v. 579, p. 22-pg., 2021-04-02. (17/17835-9)