Title: A Different Friendly Talk About Cobordism
Abstract: In this talk I will present some slightly less basic ideas about cobordism. In particular, we will discuss cobordism as a homology theory and its relationship to K-Theory.
This talk might be a little less friendly than the talk on Wednesday.
Title: Another Friendly Talk About Cobordism
Abstract: In this talk I will present some basic ideas about cobordism. In particular, we will discuss manifolds, an equivalence relation, and some rings.
Haven't had Topology I yet, you say? This talk is still for you. You'll be fine.
Title: On the ground state of the magnetic Laplacian in corner domains
Abstract: I will present recent results about the first eigenvalue of the magnetic Laplacian in general 3D-corner domains with Neumann boundary condition in the semi-classical limit. The use of singular chains show that the asymptotics of the first eigenvalue is governed by a hierarchy of model problems on the tangent cones of the domain. We provide estimations of the remainder depending on the geometry and the variations of the magnetic field. This is a joint work with V. Bonnaillie-Nol and M. Dauge.
Title: Winding Numbers and the Generalized Lower-Bound Conjecture
Abstract: Consider a set V of n distinct points in affinely general position in R^e. For 0 ≤ k < n−e , a k-splitter is the convex hull of a set of k points whose affine span separates the remaining points into two sets, one of which has size k. Let p be an additional point in affinely general position with respect to V . In this talk, we will discuss w_k(p), the kth winding number, which counts how many times k-splitters wrap around p in the counter clockwise direction. It is known that w_k(p) ≥ 0, as a consequence of the g-theorem. There are elementary proofs (Lee, Welzl) for some special cases (e.g. e = 2). We will discuss the ideas behind these proofs. Then we will discuss the relationship of this work to the g-theorem. We will then pose possible directions for further research
Rica
rdo Macip from the Universidad Autónoma de Puebla will be giving a lecture about one of Oaxaca's most treasured creatures: the turtle.
El Profesor de la Universidad Autónoma de Puebla, Ricardo Macip, estará dando una charla sobre las tortugas y su importancia en Oaxaca, México.
It has long been known that galaxies' internal structure is connected with their star formation activity in the nearby universe. Recent surveys have allowed us to study these correlations out to very large distances, allowing us for the first time to quantify these relationships over a significant span of cosmic time for statistically robust samples of objects. It has been known for several years that galaxies are growing in mass and radius, experiencing morphological transformation, and "downsizing" their star formation activity over cosmic time. Now, new observations are painting a picture in which the internal structure of galaxies (size and morphology) is intimately linked with their star formation activity and formation history. There are hints that the co-evolution of supermassive black holes with their host galaxies may be the driving force behind these correlations, but this remains controversial. While cosmological simulations set within the hierarchical formation scenario of Cold Dark Matter currently offer a plausible story for interpreting these observations, many puzzles remain. I will review recent insights gleaned from deep multi-wavelength surveys and state-of-the-art theoretical models and simulations, as well as highlight the open questions and challenges for the future.
This documentary is narrated by Gilberto Bosques and some of the protagonists of the Jewish and Spanish Republican refugees who arrived in Mexico between 1939 and 1942. After the defeat in the Civil War against Franco, Mexican president Lázaro Cárdenas sent Bosques to serve as Consul General in Paris. Once the war broke out, the consulate had to move to Marseilles, where Bosques dedicated his prodigious energies to rescuing as many people as possible by issuing them passports to Mexico. He was responsible for saving the lives of thousands of Jews and Spaniards persecuted by fascism. VISA AL PARAISO is a testimony to this unknown humanitarian mission that to this day remains a remarkable chapter of the history of Mexico.
Lillian Liberman
Lillian Liberman, the daughter of Russian emigrants, is an internationally renowned Mexican filmmaker. Chicoca, her film about child abuse was presented before the World Health Organization in Geneva and the Interamerican Society for the Prevention of Child Abuse, and won two Best Documentary prizes: the Uruguayan Film Festival and the Havana Film Festival. Her film Visa al paraíso [Visa to Paradise] features the strategic role Mexican diplomat Gilberto Bosques, as the Mexican Consul in France, played in saving the lives of many persecuted Jews and Spaniards during World War II. Liberman holds an undergraduate degree in French from the National University of Mexico (UNAM) and simultaneously took all the courses offered at the Sorbonne’s French Institute of Latin America in Mexico. She was a faculty member of French instruction at the Center for Foreign Language Instruction at UNAM. She obtained a degree in film Direction from the Center for University Studies on Cinematography at UNAM.
The circumgalactic medium contains signatures of key processes in galaxy formation, such as gas accretion and outflow, and may account for the majority of baryons in the Universe. To probe gas in this environment, I developed new methods to model quasar spectra and measure absorption induced by gas in galaxy halos. Applying the new tools to all quasar spectra in the SDSS, I have compiled a metal absorber catalog of ~50,000 systems and, for the first time, measured the large-scale distribution of gas from galaxies out to ~20 Mpc, linking the gas properties of individual galaxies to their large-scale environment. I will further discuss the new constraints of these results bring to the physics of circumgalactic medium and its role in galaxy formation and evolution in general.
