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Record W2901480228

Avances en el estudio de propiedades topológicas de flujos analíticos sobre superficies

2017· article· es· W2901480228 on OpenAlexaboutno aff
José Ginés Espín Buendía

Bibliographic record

VenueDialnet (Universidad de la Rioja) · 2017
Typearticle
Languagees
FieldMathematics
TopicAdvanced Differential Equations and Dynamical Systems
Canadian institutionsnot available
Fundersnot available
KeywordsMathematics
DOInot available

Abstract

fetched live from OpenAlex

A grandes rasgos, esta Tesis Doctoral se propone investigar el efecto de la analiticidad en el campo de los sistemas dinamicos continuos reales en dimension 2, es decir, que fenomenos dinamicos aparecen cuando la funcion que define un sistema de este tipo es analitica. Mas concretamente, este trabajo trata de avanzar en la investigacion de la naturaleza topologica de los flujos asociados a campos de vectores analiticos reales sobre superficies con los siguientes cuatro objetivos. OBJETIVO 1. La clasificacion topologica de los atractores globales inestables para flujos asociados a campos de vectores polinomicos en el plano. OBJETIVO 2. La caracterizacion topologica de los conjuntos omega-limite para flujos asociados a campos de vectores analiticos reales en abiertos de la esfera y el plano proyectivo. OBJETIVO 3. La caracterizacion topologica de los conjuntos periodicos limite para familias de flujos asociados a campos de vectores polinomicos en el plano. OBJETIVO 4. El estudio de los flujos asociados a campos de vectores analiticos en superficies con la propiedad de tener todas sus orbitas densas (los llamados flujos minimales). En cuanto a la metodologia, la investigacion se ha realizado en el Departamento de Matematicas de la Universidad de Murcia, bajo la cobertura del grupo de investigacion de Sistemas Dinamicos de la Region de Murcia. El autor de la Tesis Doctoral ha participado de forma activa en las actividades de indole cientifico que desarrolla este grupo y ha ido presentando a la comunidad cientifica su trabajo en sucesivos congresos (mediante exposiciones orales o la presentacion de poster). Al mismo tiempo, el autor de la Tesis ha disfrutado de visitas investigadoras cortas en la Universidad de Toronto en Canada, en la Universidad de Toulouse en Francia y en el Instituto de Ciencias Matematicas de Madrid (ICMAT) y dos estancias largas (de cuatro meses cada una) en el propio ICMAT y en la Universidad de Plymouth en Reino Unido. Esta ultima estancia permite optar a la Mencion de Doctor Internacional. La investigacion ha desembocado en la Tesis Doctoral que se presenta, esta ataca los cuatro anteriores objetivos recopilando trabajos de investigacion que el autor de la Tesis ha realizado en colaboracion tanto con su director, Victor Jimenez, como con Andre Belotto, Daniel Peralta-Salas y Gabriel Soler. En colaboracion con Victor Jimenez, se ha conseguido dar la clasificacion topologica completa a la que se refiere el primero de los objetivos de arriba; de igual modo, en colaboracion con Andre Belotto, se ha completado la caracterizacion topologica que atane al segundo de los objetivos. En un trabajo conjunto con Daniel Peralta-Salas y Gabriel Soler, se ataco el cuarto de los objetivos, resultando una clasificacion completa de todas las superficies orientables y no orientables de genero finito que admiten flujos analiticos minimales y presentando un ejemplo de superficie no orientable de genero infinito con igual propiedad. Por ultimo, en cuanto al objetivo tercero, y tambien en colaboracion con Victor Jimenez, se ha conseguido completar la prueba de la caracterizacion topologica de los conjuntos omega-limite para flujos analiticos sobre la esfera, el plano y el plano proyectivo asi como avanzar en la caracterizacion de estos conjuntos para flujos analiticos definidos en abiertos del plano. In broad terms, this dissertation intends to investigate the effect of the analyticity on the the field of continuous dynamical systems of dimension 2, that is, what dynamical phenomena appear when the function defining such a system is analytic. Being more concrete, we aim to advance in the study of the topological nature of the flows associated to real analytic vector fields on surfaces with the following four objectives. OBJECTIVE 1. The topological classification of unstable global attractors for flows associated to polynomial vector fields on the plane. OBJECTIVE 2. The topological characterization of the omega-limit sets for flows associated to analytic vector fields on open subsets of the sphere and the projective plane. OBJECTIVE 3. The topological characterization of the limit periodic sets for families of flows associated to polynomial vector fields on the plane. OBJECTIVE 4. The study of the flows associated to analytic vector fields on surfaces with the property of having all their orbits dense (the so-called minimal flows). Regarding the methodology, the research was carried out in the Department of Mathematics of the University of Murcia, under the support of the Research Group of Dynamic Systems of the Region of Murcia. The student has actively participated in the scientific activities developed by this group and has presented his work to the scientific community in different congresses (via oral presentations and posters). At the same time, the student has enjoyed short research visits at the University of Toronto in Canada, the University of Toulouse in France and the Instituto de Ciencias Matematicas in Madrid (ICMAT) and two long stays (four months each) at ICMAT itself and at the University of Plymouth in the United Kingdom. This last stay allows to apply for the Mencion Internacional de Doctorado. The research has led to the presented PhD Thesis, which attacks the previous four objectives, compiling research papers that the author of the Thesis has done in collaboration with its director, Victor Jimenez, as well as Andre Belotto, Daniel Peralta-Salas and Gabriel Soler. In collaboration with Victor Jimenez, it has been possible to give the complete topological classification referred to in the first of the objectives above; in the same way, in collaboration with Andre Belotto, the topological characterization that corresponds to the second of the objectives has been completed. In a joint work with Daniel Peralta-Salas and Gabirel Soler, the fourth of the objectives was attacked, resulting in a complete classification of all orientable and non-orientable surfaces of finite genus that admit minimal analytical flows and presenting an example of non-orientable surface of infinite genus with the same property. Finally, in relation to the third objective, and also in collaboration with Victor Jimenez, it has been possible to complete the proof of the topological characterization of the omega-limit sets for analytical flows on the sphere, the plane and the projective plane as well as to advance in the characterization of these sets for analytical flows defined on open subsets of the plane.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.001
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow), Science and technology studies
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Theoretical or conceptual · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.540
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.001
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0000.000
Science and technology studies0.0010.001
Scholarly communication0.0010.001
Open science0.0010.000
Research integrity0.0010.001
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.019
GPT teacher head0.317
Teacher spread0.298 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

Study designTheoretical or conceptual
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

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Citations0
Published2017
Admission routes1
Has abstractyes

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