Seminars

Energetic methods for capturing sharp convergence- and metastable-relaxation-rates of gradient flows.

Event Date: Jun 24, 2021 in Differential Equations, Seminars

Abstract: (Ver pdf adjunto)

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Auctions with Intermediaries.

Event Date: Jun 23, 2021 in ACGO, Seminars

Abstract: In many markets, buyers do not bid directly in the auction, but instead, they are represented by intermediaries. This includes ad auctions, where some of the buyers might be represented by intermediaries like Ad agencies, Aggregators (e.g. Home Advisor), or Ad networks participating in an Ad Exchange. The presence of intermediaries creates the potential for collusion across buyers. Also, intermediaries have their own goals that depend on the contract between buyers and the intermediary, and will behave according to the incentives induced by their goals. We will talk about the...

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Buscando ciclos balanceados.

Event Date: Jun 21, 2021 in Seminario de Grafos, Seminars

Resumen:  El teorema de los patrones inevitables dice que, para n suficientemente grande, toda 2-coloración de E(K_n) con “suficientes” aristas en cada clase cromática contiene al menos uno de dos patrones: una K_2t donde una clase cromática induce una K_t o bien una K_2t donde una clase cromática induce dos K_t disjuntas. Una gráfica G es balanceable si existe un entero no negativo k tal que toda 2-coloración de E(K_n) con más de k aristas en cada clase cromática contiene una copia de G de forma balanceada (la mitad de sus aristas son azules y el resto rojas). El entero k más...

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Concepciones sobre la evaluación de los formadores de Pedagogía en Matemática

Event Date: Jul 06, 2021 in Education, Seminars

Resumen Hoy en día, los docentes en matemática debiesen ser capaces de desarrollar diversas habilidades, especialmente en la resolución de problemas en los estudiantes, así como también monitorear su avance. Si bien la formación inicial docente debiese contribuir en el aprendizaje de estas capacidades en los futuros docentes, se observa que los egresados obtienen un 60.4% de respuestas correctas en el estándar de evaluación en la evaluación diagnóstica de la formación docente inicial ENED-FID, con una alta variación institucional. Este bajo desempeño también se refleja en los...

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Investigating students’ coordinate systems

Event Date: Aug 03, 2021 in Education, Seminars

Abstract Starting around fifth grade, students are expected to represent and reason about various mathematical concepts (e.g., geometrical shapes, equations, and functions, etc.) using the Cartesian plane. However, the Cartesian plane is often taken for granted and students are assumed to develop proficiency in using the Cartesian plane in relatively unproblematic ways. My research has focused on understanding how students construct and make sense of coordinate systems, the foundational structure underlying graphs. I will (a) present a distinction between two types of coordinate systems that...

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Some discrete optimization problems in matching markets.

Event Date: Jun 16, 2021 in ACGO, Seminars

Abstract:  In the classical stable marriage problem, we are given two sets of agents – students and schools – with each student and school having a total order of agents from the opposite set. The goal is to form disjoint pairs of students and schools so that the resulting matching satisfies a fairness property known as stability. In their fundamental work, Gale and Shapley showed that a stable matching always exists and gave a fast algorithm to find one. These strong structural and algorithmic results propelled the application of the stable marriage model in several contexts,...

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