When models are wrong, but useful

Applied mathematics provides a collection of methods to allow scientists and engineers to make the most of experimental data, in order to answer their scientific questions and make predictions. The key link between experiments, understanding, and predictions is a mathematical model: you can find many examples in our case-studies. Experimental data can be used to calibrate a model by inferring the parameters of a real-world system from its observed behaviour.

Mon, 25 Nov 2019
12:45
L3

Special functions and complex surfaces in high-energy physics

Lorenzo Tancredi
(University of Oxford)
Abstract

I will elaborate on some recent developments on the theory of special functions which are relevant to the calculation of Feynman integrals in perturbative quantum field theory, highlighting the connections with some recent ideas in pure mathematics.

Mon, 18 Nov 2019
15:45
L6

On the smooth mapping class group of the 4-sphere

David Gay
(University of Georgia/MPIM Bonn)
Abstract

The smooth mapping class group of the 4-sphere is pi_0 of the space of orientation preserving self-diffeomorphisms of S^4. At the moment we have no idea whether this group is trivial or not. Watanabe has shown that higher homotopy groups can be nontrivial. Inspired by Watanabe's constructions, we'll look for interesting self-diffeomorphisms of S^4. Most of the talk will be an outline for a program to find a nice geometric generating set for this mapping class group; a few small steps in the program are actually theorems. The point of finding generators is that if they are explicit enough then you have a hope of either showing that they are all trivial or finding an invariant that is well adapted to obstructing triviality of these generators.

Sun, 01 Dec 2019

17:30 - 18:30
L1

Bach, the Universe and Everything - The Creativity Code

Marcus du Sautoy and the Orchestra of the Age of Enlightenment
((Oxford University))
Further Information

The second in our fascinating collaboration with the Orchestra of the Age of Enlightenment (OAE) and Music at Oxford combines the muscial intelligence of the eighteenth century with the artificial intelligence of the twenty-first. Come along and hear the beauty of Bach's Nun komm, der Heiden Heiland (Now come, Saviour of the Gentiles) and the modern beauty of machine learning which may itself be the musical choice of audiences in 300 years' time.

The OAE provide the music (you even get to join in), Marcus delivers the sermon. Maths and Music; saying everything.

Book here

Cosmic ray spectrum and composition from PeV to EeV using 3 years of data from IceTop and IceCube
 Aartsen, M Ackermann, M Adams, J Aguilar, J Ahlers, M Ahrens, M Alispach, C Andeen, K Anderson, T Ansseau, I Anton, G Arguelles, C Auffenberg, J Axani, S Backes, P Bagherpour, H Bai, X Barbano, A Barwick, S Baum, V Baur, S Bay, R Beatty, J Becker, K Tjus, J BenZvi, S Berley, D Bernardini, E Besson, D Binder, G Bindig, D Blaufuss, E Blot, S Bohm, C Boerner, M Boeser, S Botner, O Boettcher, J Bourbeau, E Bourbeau, J Bradascio, F Braun, J Bretz, H Bron, S Brostean-Kaiser, J Burgman, A Buscher, J Busse, R Carver, T Chen, C Cheung, E Chirkin, D Clark, K Classen, L Collin, G Conrad, J Coppin, P Correa, P Cowen, D Cross, R Dave, P de Andre, J De Clercq, C DeLaunay, J Dembinski, H Deoskar, K De Ridder, S Desiati, P de Vries, K de Wasseige, G de With, M DeYoung, T Diaz, A Diaz-Velez, J Dujmovic, H Dunkman, M Dvorak, E Eberhardt, B Ehrhardt, T Eller, P Evenson, P Fahey, S Fazely, A Felde, J Feusels, T Filimonov, K Finley, C Franckowiak, A Friedman, E Fritz, A Gaisser, T Gallagher, J Ganster, E Garrappa, S Gerhardt, L Ghorbani, K Glauch, T Gluesenkamp, T Goldschmidt, A Gonzalez, J Grant, D Griffith, Z Guender, M Guenduez, M Haack, C Hallgren, A Halve, L Halzen, F Hanson, K Hebecker, D Heereman, D Heix, P Helbing, K Hellauer, R Henningsen, F Hickford, S Hignight, J Hill, G Hoffman, K Hoffmann, R Hoinka, T Hokanson-Fasig, B Hoshina, K Huang, F Huber, M Hultqvist, K Huennefeld, M Hussain, R In, S Iovine, N Ishihara, A Jacobi, E Japaridze, G Jeong, M Jero, K Jones, B Jonske, F Joppe, R Kang, W Kappes, A Kappesser, D Karg, T Karl, M Karle, A Katz, U Kauer, M Kelley, J Kheirandish, A Kim, J Kintscher, T Kiryluk, J Kittler, T Klein, S Koirala, R Kolanoski, H Koepke, L Kopper, C Kopper, S Koskinen, D Kowalski, M Krings, K Krueckl, G Kulacz, N Kunwar, S Kurahashi, N Kyriacou, A Labare, M Lanfranchi, J Larson, M Lauber, F Lazar, J Leonard, K Leuermann, M Liu, Q Lohfink, E Mariscal, C Lu, L Lucarelli, F Lunemann, J Luszczak, W Madsen, J Maggi, G Mahn, K Makino, Y Mallik, P Mallot, K Mancina, S Mari, I Maruyama, R Mase, K Maunu, R Meagher, K Medici, M Medina, A Meier, M Meighen-Berger, S Menne, T Merino, G Meures, T Miarecki, S Micallef, J Momente, G Montaruli, T Moore, R Morse, R Moulai, M Muth, P Nagai, R Nahnhauer, R Nakarmi, P Naumann, U Neer, G Niederhausen, H Nowicki, S Nygren, D Pollmann, A Olivas, A O'Murchadha, A O'Sullivan, E Palczewski, T Pandya, H Pankova, D Park, N Peiffer, P de los Heros, C Philippen, S Pieloth, D Pinat, E Pizzuto, A Plum, M Porcelli, A Price, P Przybylski, G Raab, C Raissi, A Rameez, M Rauch, L Rawlins, K Rea, I Reimann, R Relethford, B Renzi, G Resconi, E Rhode, W Richman, M Robertson, S Rongen, M Rott, C Ruhe, T Ryckbosch, D Rysewyk, D Safa, I Herrera, S Sandrock, A Sandroos, J Santander, M Sarkar, S Satalecka, K Schaufel, M Schlunder, P Schmidt, T Schneider, A Schneider, J Schumacher, L Sclafani, S Seckel, D Seunarine, S Shefali, S Silva, M Snihur, R Soedingrekso, J Soldin, D Song, M Spiczak, G Spiering, C Stachurska, J Stamatikos, M Stanev, T Stasik, A Stein, R Stettner, J Steuer, A Stezelberger, T Stokstad, R Stossl, A Strotjohann, N Stuerwald, T Stuttard, T Sullivan, G Sutherland, M Taboada, I Tenholt, F Ter-Antonyan, S Terliuk, A Tilav, S Tomankova, L Tonnis, C Toscano, S Tosi, D Tselengidou, M Tung, C Turcati, A Turcotte, R Turley, C Ty, B Unger, E Elorrieta, M Usner, M Vandenbroucke, J Van Driessche, W van Eijk, D van Eijndhoven, N Vanheule, S van Santen, J Vraeghe, M Walck, C Wallace, A Wallraff, M Wandkowsky, N Watson, T Weaver, C Weiss, M Weldert, J Wendt, C Werthebach, J Westerhoff, S Whelan, B Whitehorn, N Wiebe, K Wiebusch, C Wille, L Williams, D Wills, L Wolf, M Wood, J Wood, T Woschnagg, K Wrede, G Xu, D Xu, X Xu, Y Yanez, J Yodh, G Yoshida, S Yuan, T Zoecklein, M Collaboration, I PHYSICAL REVIEW D volume 100 issue 8 (23 Oct 2019) http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000491993600001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=4fd6f7d59a501f9b8bac2be37914c43e

Oxford Mathematics 2nd Year Student Lecture on Differential Equations now online

We continue with our series of Student Lectures with this first lecture in the 2nd year Course on Differential Equations. Professor Philip Maini begins with a recap of the previous year's work before moving on to give examples of ordinary differential equations which exhibit either unique, non-unique, or no solutions. This leads us to Picard's Existence and Uniqueness Theorem...

Mon, 20 Jan 2020

14:15 - 15:15
L4

Symplectic geometry of Conical Symplectic Resolutions

Filip Zivanovic
(Oxford)
Abstract

Conical Symplectic Resolutions form a broad family of holomorphic symplectic manifolds that are of interest to mathematical physicists, algebraic geometers, and representation theorists; Nakajima Quiver Varieties and Hypertoric Varieties are known as their special cases. In this talk, I will be focused on the Symplectic Geometry of Conical Symplectic Resolutions, and its non-symplectic applications. More precisely, I will talk about my work on finding Exact Lagrangian Submanifolds inside CSRs, and work in progress (joint with Alexander Ritter) about the construction of Symplectic Cohomology on CSRs.

 

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