# Suchergebnis: Katalogdaten im Frühjahrssemester 2021

Mathematik Bachelor | ||||||

Seminare Dieses Semester haben viele Seminare eine Warteliste mit speziellem Auswahlverfahren. Falls keine anderen Auswahlkriterien vorliegen, werden bei der definitiven Belegung zuerst jene Studierenden berücksichtigt, welche noch keine andere Seminarbelegung haben. Wenn Sie sich in zwei Wartelisten eintragen, so tun Sie dies am besten so: wählen Sie zuerst das Seminar aus, das Sie bevorzugen, und wählen Sie ein paar Minuten später eine Ausweichmöglichkeit aus. WICHTIG: Schreiben Sie sich in höchstens zwei Wartelisten ein! | ||||||

Nummer | Titel | Typ | ECTS | Umfang | Dozierende | |
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401-2140-21L | Seminar über algebraische Zahlentheorie Teilnehmerzahl maximal 12 | W | 4 KP | 2S | R. Steiner | |

Kurzbeschreibung | In diesem Seminar erarbeitet und lernt ihr wie diverse Konzepte der ganzen Zahlen, so zum Beispiel die Primzahlfaktorisierung, auf endliche Körpererweiterung der rationalen Zahlen verallgemeinert werden können. Dazu wird die robustere Theorie der Dedekind Ringe erarbeitet und mit der Galois'schen Theorie der Körpererweiterungen kombiniert. | |||||

Lernziel | - Kenntnisse über Dedekind Ringe und die Faktorisierung von Idealen sowie ihre Klassengruppen. - Wissen wie sich die Primideale unter Körpererweitungen verhalten und wie dieses Verhalten zu berechnen ist. - Diverse Einblicke in weiterführende algebraische, geometrische und analytische Zahlentheorie, so zum Beispiel: Kummer Theorie, Chebotarev'scher Dichtigkeitsatz, Dirichlet'scher Einheitssatz, Dirichlet'sche L-Funktionen. | |||||

Voraussetzungen / Besonderes | Algebra I & II, den letzteren darf man auch im Parallelen besuchen | |||||

401-3110-21L | Student Seminar in Number Theory: Modular Forms Number of participants limited to 26. | W | 4 KP | 2S | M. Schwagenscheidt | |

Kurzbeschreibung | Seminar on the basic theory of classical elliptic modular forms | |||||

Lernziel | In the seminar we will learn about the basic theory of classical elliptic modular forms. We start with the action of the modular group on the complex upper half-plane by Moebius transformations and describe its fundamental domain. As first examples of modular forms, we will investigate Eisenstein series, Ramanujan's Delta function, the Dedekind eta function, and the modular j-invariant. We will show that the space of modular forms of a fixed weight is finite dimensional, and determine its dimension. We will also study Hecke operators and the Petersson inner product on spaces of modular forms, and the L-functions associated with modular forms. Towards the end of the seminar we will discuss some more advanced topics, such as differential operators and quasimodular forms, the CM values of the j-function, and the periods of modular forms. | |||||

Skript | Link | |||||

Literatur | Cohen, Strömberg: Modular Forms: A Classical Approach Diamond, Shurman: A first course in modular forms Koblitz: Introduction to elliptic curves and modular forms Koecher, Krieg: Elliptische Funktionen und Modulformen Lang: Introduction to modular forms Miyake: Modular forms Serre: A course in arithmetic Zagier: The 1-2-3 of modular forms Lecture notes on modular forms, available online: Link | |||||

Voraussetzungen / Besonderes | We will need the fundamental results from complex analysis, and some elementary group theory. The website of the seminar can be found at Link | |||||

401-3140-21L | Monstrous Moonshine Number of participants limited to 12. | W | 4 KP | 2S | T.‑H. Bülles, R. Pandharipande | |

Kurzbeschreibung | We study Monstrous Moonshine, the surprising connection between modular forms and the Monster group. | |||||

Lernziel | To understand the equation 196884 = 196883 + 1. | |||||

Voraussetzungen / Besonderes | Algebra I and II. Some familiarity with modular forms and Lie algebras is helpful, but not crucial: all necessary concepts will be introduced in the early talks. | |||||

401-3520-21L | Sphere Packings, Lattices and Codes Number of participants limited to 12. | W | 4 KP | 2S | D. Radchenko | |

Kurzbeschreibung | Seminar on Sphere Packings, Lattices and Codes | |||||

Lernziel | To learn about the sphere packing problem and its connection to various other topics such as error-correcting codes, combinatorial and spherical designs, and modular forms. | |||||

Inhalt | Some of the tentative topics include: sphere packing problem; the kissing number problem; error-correcting codes; Shannon capacity; finite projective planes; binary Golay code; spherical designs; theta functions of lattices; linear programming bounds for spherical codes and sphere packings. | |||||

Literatur | J.H. Conway, N.J. Sloane, Sphere Packings, Lattices and Groups, 3rd edition, Springer-Verlag New York, 2017. W. Ebeling, Lattices and Codes: A Course Partially Based on Lectures by Friedrich Hirzebruch, third edition, Springer Spektrum, Wiesbaden, 2013. D. Zagier, Elliptic modular forms and their applications, in "The 1-2-3 of Modular Forms" (K. Ranestad, ed.), Universitext, Springer, Berlin, 2008. C. Zong, Sphere Packings, Universitext, Springer-Verlag New York, 1999. | |||||

Voraussetzungen / Besonderes | Many of the topics are self-contained and require only basic knowledge of linear algebra and analysis. Some of the later talks require basic knowledge of complex analysis. Some degree of familiarity with modular forms is also helpful, but not strictly necessary. | |||||

401-3350-21L | Classical Theory of Elliptic Partial Differential Equations Number of participants limited to 12. | W | 4 KP | 2S | J. Serra | |

Kurzbeschreibung | Following the book "Elliptic Partial Differential Equations" of Qing Han and Fanhua Lin, the seminar will cover ---from an introductory perspective--- some important classical tools and results in the standard theory of Elliptic PDE | |||||

Lernziel | To present some of the most useful classical tools and results in nonlinear Elliptic PDE (weak and viscosity solutions and their maximum principles, moving plane method, Bernstein's technique, De Giorgi-Nash-Moser Harnack Inequality, etc.) | |||||

Inhalt | (flexible depending on the background of the students) -Review of harmonic functions -Weak and viscosity solutions -Maximum principles and barriers -Moving plane method -Bernstein's technique -Schauder estimates (review) -De Giorgi-Nash-Moser and Hölder continuity of gradients | |||||

Literatur | Elliptic Partial Differential Equations: Second Edition Qing Han and Fanghua Lin Publication Year: 2011 ISBN-10: 0-8218-5313-9 ISBN-13: 978-0-8218-5313-9 Courant Lecture Notes, vol. 1.R | |||||

Voraussetzungen / Besonderes | Although many parts of the book are rather self-contained, it would be advisable to have followed before the bachelor course Functional Analysis II | |||||

401-3830-21L | Wave Equations on Black Hole Spacetimes Number of participants limited to 12. | W | 4 KP | 2S | C. Kehle | |

Kurzbeschreibung | Introduction to Lorentzian geometry, to the notion of a black hole, and to the study of linear wave equations on such spacetimes. | |||||

Lernziel | We will learn about the basics of Lorentzian geometry, the geometric framework which incorporates space and time as one geometric entity---spacetime. Then, we will briefly introduce the Einstein equations of General Relativity and study the Schwarzschild and Reissner--Nordström black holes solutions. We will further discuss tools to study linear wave equations on black holes and other spacetimes. | |||||

Inhalt | Black holes are among the central theoretical predictions of general relativity which is governed by the celebrated Einstein's equations. The notion of a black hole has a clean mathematical definition, and the concept is already exhibited by the simplest non-trivial solution of the Einstein vacuum equation: the Schwarzschild solution. These “black hole spacetimes” give rise to many natural mathematical problems in the analysis of (hyperbolic) PDE which in turn describe physical phenomena related to black holes. More specifically we will cover the following topics: Basic Lorentzian geometry, the Schwarzschild and Reissner-Nordström black hole, the wave equation on general Lorentzian manifolds, the wave equation on black hole backgrounds. We will also adapt the content to the prior knowledge of the students. | |||||

Literatur | Main reference: Lecture Notes of Mihalis Dafermos: Link Further references (going beyond the scope of the seminar): - Dafermos, Mihalis, and Igor Rodnianski. "Lectures on black holes and linear waves." Clay Math. Proc 17 (2013): 97-205. (see also arXiv:0811.0354) - Aretakis, Stefanos. "General Relativity". Link - Christodoulou, Demetrios. Mathematical problems of general relativity I. Vol. 1. European Mathematical Society, 2008. | |||||

Voraussetzungen / Besonderes | Ideally, participants have some familiarity with the basics of differential manifolds (definition of smooth manifolds, tangent space, vector fields, as well as the formal apparatus of Riemannian geometry: connections, curvature, geodesics) and basic functional analysis (Sobolev spaces, etc.). | |||||

401-3940-21L | Student Seminar in Mathematics and Data: Optimal Transport Number of participants limited to 12. | W | 4 KP | 2S | A. Bandeira, G. Chinot | |

Kurzbeschreibung | The Seminar starts with a basic introduction to Optimal Transport (including but not limited to: Monge and Kantorovich formulations, duality, Wassertstein distance). After the introductory material, each week will be devoted to either a research article in the topic or a more advanced concept. Particular emphasis will be given to applications to statistics and data science. | |||||

Lernziel | ||||||

Skript | More information, including list of papers, will be available at Link | |||||

Literatur | More information, including list of papers, will be available at Link | |||||

Voraussetzungen / Besonderes | This seminar requires a certain degree of mathematical maturity--including abstract thinking and the ability to understand and write proofs. Probability theory and Linear Algebra is a required pre-requisite. Some basic familiarity with Optimization and Functional Analysis is beneficial. | |||||

401-3600-21L | Student Seminar in Probability Theory Limited number of participants. Registration to the seminar will only be effective once confirmed by email from the organizers. | W | 4 KP | 2S | W. Werner, J. Bertoin, V. Tassion | |

Kurzbeschreibung | ||||||

Lernziel | ||||||

401-3620-21L | Student Seminar in Statistics: Statistical Network Modeling Maximale Teilnehmerzahl: 48 Hauptsächlich für Studierende der Bachelor- und Master-Studiengänge Mathematik, welche nach der einführenden Lerneinheit 401-2604-00L Wahrscheinlichkeit und Statistik (Probability and Statistics) mindestens ein Kernfach oder Wahlfach in Statistik besucht haben. Das Seminar wird auch für Studierende der Master-Studiengänge Statistik bzw. Data Science angeboten. | W | 4 KP | 2S | P. L. Bühlmann, M. Azadkia | |

Kurzbeschreibung | Network models can be used to analyze non-iid data because their structure incorporates interconnectedness between the individuals. We introduce networks, describe them mathematically, and consider applications. | |||||

Lernziel | Network models can be used to analyze non-iid data because their structure incorporates interconnectedness between the individuals. The participants of the seminar acquire knowledge to formulate and analyze network models and to apply them in examples. | |||||

Literatur | E. D. Kolaczyk and G. Csárdi. Statistical analysis of network data with R. Springer, Cham, Switzerland, second edition, 2020. Tianxi Li, Elizaveta Levina, and Ji Zhu. Network cross-validation by edge sampling, 2020. Preprint arXiv:1612.04717. Tianxi Li, Elizaveta Levina, and Ji Zhu. Community models for partially observed networks from surveys, 2020. Preprint arXiv:2008.03652. Tianxi Li, Elizaveta Levina, and Ji Zhu. Prediction Models for Network-Linked Data, 2018. Preprint arXiv:1602.01192. | |||||

Voraussetzungen / Besonderes | Every class will consist of an oral presentation highlighting key ideas of selected book chapters by a pair of students. Another two students will be responsible for asking questions during the presentation and providing a discussion of the the presented concepts and ideas, including pros+cons, at the end. Finally, an additional two students are responsible for giving an evaluation on the quality of the presentations/discussions and provide constructive feedback for improvement. | |||||

401-3620-20L | Student Seminar in Statistics: Inference in Non-Classical Regression Models Findet dieses Semester nicht statt. Maximale Teilnehmerzahl: 24 Hauptsächlich für Studierende der Bachelor- und Master-Studiengänge Mathematik, welche nach der einführenden Lerneinheit 401-2604-00L Wahrscheinlichkeit und Statistik (Probability and Statistics) mindestens ein Kernfach oder Wahlfach in Statistik besucht haben. Das Seminar wird auch für Studierende der Master-Studiengänge Statistik bzw. Data Science angeboten. | W | 4 KP | 2S | F. Balabdaoui | |

Kurzbeschreibung | Review of some non-standard regression models and the statistical properties of estimation methods in such models. | |||||

Lernziel | The main goal is the students get to discover some less known regression models which either generalize the well-known linear model (for example monotone regression) or violate some of the most fundamental assumptions (as in shuffled or unlinked regression models). | |||||

Inhalt | Linear regression is one of the most used models for prediction and hence one of the most understood in statistical literature. However, linearity might too simplistic to capture the actual relationship between some response and given covariates. Also, there are many real data problems where linearity is plausible but the actual pairing between the observed covariates and responses is completely lost or at partially. In this seminar, we review some of the non-classical regression models and the statistical properties of the estimation methods considered by well-known statisticians and machine learners. This will encompass: 1. Monotone regression 2. Single index model 3. Unlinked regression 4. Partially unlinked regression | |||||

Skript | No script is necessary for this seminar | |||||

Literatur | In the following is the material that will read and studied by each pair of students (all the items listed below are available through the ETH electronic library or arXiv): 1. Chapter 2 from the book "Nonparametric estimation under shape constraints" by P. Groeneboom and G. Jongbloed, 2014, Cambridge University Press 2. "Nonparametric shape-restricted regression" by A. Guntuoyina and B. Sen, 2018, Statistical Science, Volume 33, 568-594 3. "Asymptotic distributions for two estimators of the single index model" by Y. Xia, 2006, Econometric Theory, Volume 22, 1112-1137 4. "Least squares estimation in the monotone single index model" by F. Balabdaoui, C. Durot and H. K. Jankowski, Journal of Bernoulli, 2019, Volume 4B, 3276-3310 5. "Least angle regression" by B. Efron, T. Hastie, I. Johnstone, and R. Tibshirani, 2004, Annals of Statsitics, Volume 32, 407-499. 6. "Sharp thresholds for high dimensional and noisy sparsity recovery using l1-constrained quadratic programming (Lasso)" by M. Wainwright, 2009, IEEE transactions in Information Theory, Volume 55, 1-19 7."Denoising linear models with permuted data" by A. Pananjady, M. Wainwright and T. A. Courtade and , 2017, IEEE International Symposium on Information Theory, 446-450. 8. "Linear regression with shuffled data: statistical and computation limits of permutation recovery" by A. Pananjady, M. Wainwright and T. A. Courtade , 2018, IEEE transactions in Information Theory, Volume 64, 3286-3300 9. "Linear regression without correspondence" by D. Hsu, K. Shi and X. Sun, 2017, NIPS 10. "A pseudo-likelihood approach to linear regression with partially shuffled data" by M. Slawski, G. Diao, E. Ben-David, 2019, arXiv. 11. "Uncoupled isotonic regression via minimum Wasserstein deconvolution" by P. Rigollet and J. Weed, 2019, Information and Inference, Volume 00, 1-27 | |||||

401-3900-16L | Advanced Topics in Discrete Optimization Number of participants limited to 12. | W | 4 KP | 2S | R. Zenklusen, R. Santiago Torres, V. Traub | |

Kurzbeschreibung | In this seminar we will discuss selected topics in discrete optimization. The main focus is on mostly recent research papers in the field of Combinatorial Optimization. | |||||

Lernziel | The goal of the seminar is twofold. First, we aim at improving students' presentation and communication skills. In particular, students are to present a research paper to their peers and the instructors in a clear and understandable way. Second, students learn a selection of recent cutting-edge approaches in the field of Combinatorial Optimization by attending the other students' talks. A very active participation in the seminar helps students to build up the necessary skills for parsing and digesting advanced technical texts on a significantly higher complexity level than usual textbooks. A key goal is that students prepare their presentations in a concise and accessible way to make sure that other participants get a clear idea of the presented results and techniques. Students intending to do a project in optimization are strongly encouraged to participate. | |||||

Inhalt | The selected topics will cover various classical and modern results in Combinatorial Optimization. Contrary to prior years, a very significant component of the seminar will be interactive discussions where active participation of the students is required. | |||||

Literatur | The learning material will be in the form of scientific papers. | |||||

Voraussetzungen / Besonderes | Requirements: We expect students to have a thorough understanding of topics covered in the course "Mathematical Optimization". | |||||

252-4102-00L | Seminar on Randomized Algorithms and Probabilistic Methods Findet dieses Semester nicht statt. The deadline for deregistering expires at the end of the second week of the semester. Students who are still registered after that date, but do not attend the seminar, will officially fail the seminar. Number of participants limited to 24. | W | 2 KP | 2S | A. Steger | |

Kurzbeschreibung | The aim of the seminar is to study papers which bring the students to the forefront of today's research topics. This semester we will study selected papers of the conference Symposium on Discrete Algorithms (SODA18). | |||||

Lernziel | Read papers from the forefront of today's research; learn how to give a scientific talk. | |||||

Voraussetzungen / Besonderes | The seminar is open for both students from mathematics and students from computer science. As prerequisite we require that you passed the course Randomized Algorithms and Probabilistic Methods (or equivalent, if you come from abroad). | |||||

263-4203-00L | Geometry: Combinatorics and Algorithms The deadline for deregistering expires at the end of the second week of the semester. Students who are still registered after that date, but do not attend the seminar, will officially fail the seminar. | W | 2 KP | 2S | B. Gärtner, M. Hoffmann, E. Welzl, M. Wettstein | |

Kurzbeschreibung | This seminar complements the course Geometry: Combinatorics & Algorithms. Students of the seminar will present original research papers, some classic and some of them very recent. | |||||

Lernziel | Each student is expected to read, understand, and elaborate on a selected research paper. To this end, (s)he should give a 45-min. presentation about the paper. The process includes * getting an overview of the related literature; * understanding and working out the background/motivation: why and where are the questions addressed relevant? * understanding the contents of the paper in all details; * selecting parts suitable for the presentation; * presenting the selected parts in such a way that an audience with some basic background in geometry and graph theory can easily understand and appreciate it. | |||||

Inhalt | This seminar is held once a year and complements the course Geometry: Combinatorics & Algorithms. Students of the seminar will present original research papers, some classic and some of them very recent. The seminar is a good preparation for a master, diploma, or semester thesis in the area. | |||||

Voraussetzungen / Besonderes | Prerequisite: Successful participation in the course "Geometry: Combinatorics & Algorithms" (takes place every HS) is required. | |||||

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