Seminars this week

20210513T100000 20210513T105000 SP2RC seminar (Dr Hugh Hudson) Speaker: Dr Hugh Hudson (University of Glasgow and UC Berkeley)\n Title: UK-SOSS: Carrington Events \n URL: /maths/sem_week.html?id=3666\n

SP2RC seminar

Dr Hugh Hudson (University of Glasgow and UC Berkeley)

UK-SOSS: Carrington Events

Thu, 13 May at 10:00
Zoom Link: https://zoom.us/j/95338171418

Abstract

We often cite the Carrington flare (SOL1859-09-01) as an extreme flare/CME/geostorm event and a prototype "superflare." I discuss the original observations in the context of what we now know about solar and stellar flares. Although not an extreme event in the sense of being truly exceptional, it has become clear that the Carrington flare turned into a milestone in what we now call "multimessenger astronomy."

Arrangements

Zoom Link: https://zoom.us/j/95338171418

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20210518T130000 20210518T135000 Number Theory seminar (Srilakshmi Krishnamoorthy) Speaker: Srilakshmi Krishnamoorthy (I.I.S.E.R. Thiruvanthapuram)\n Home page: https://www.iisertvm.ac.in/faculty/srilakshmi/\n Title: The Eisenstein elements of modular symbols of square-free level \n URL: /maths/sem_week.html?id=3655\n

Number Theory seminar

Srilakshmi Krishnamoorthy (I.I.S.E.R. Thiruvanthapuram)

The Eisenstein elements of modular symbols of square-free level

Tue, 18 May at 13:00
Meet

Abstract

We present the explicit expression of the Eisenstein elements inside the space of modular symbols for Eisenstein series with integer coefficients for the congruence subgroups Γ0(N) of square- free level N. This answers a question of Merel. Our results are explicit versions of the Manin-Drinfeld theorem.

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20210518T140000 20210518T145000 MiaowMiaow (2d category theory) (Joseph Martin and Callum Reader) Speaker: Joseph Martin and Callum Reader (Sheffield)\n Title: \n URL: /maths/sem_week.html?id=3665\n

MiaowMiaow (2d category theory)

Joseph Martin and Callum Reader (Sheffield)

Tue, 18 May at 14:00
Google Meet. Link will be emailed.

Abstract

The seminar will run for 90 mins.

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20210519T140000 20210519T145000 Pure Maths Colloquium (Birgit Richter) Speaker: Birgit Richter (University of Hamburg)\n Home page: https://www.math.uni-hamburg.de/home/richter/\n Title: Detecting and describing ramification for structured ring spectra \n URL: /maths/sem_week.html?id=3620\n

Pure Maths Colloquium

Birgit Richter (University of Hamburg)

Detecting and describing ramification for structured ring spectra

Wed, 19 May at 14:00
Meet

Abstract

This is a report on joint work with Eva Höning.

For rings of integers in an extension of number fields there are classical methods for detecting ramification and for identifying ramification as being tame or wild. Noether's theorem characterizes tame ramification in terms of a normal basis and tame ramification can also be detected via the surjectivity of the norm map. We take the latter fact and use the Tate cohomology spectrum to detect wild ramification in the context of commutative ring spectra. I will discuss several examples in the context of topological K-theory and modular forms.

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20210519T150000 20210519T155000 Algebraic Geometry Learning Seminar: Toric varieties (Alberto Cobos) Speaker: Alberto Cobos\n Title: Toric Fano varieties, reflexive polytopes and mirror symmetry\n URL: /maths/sem_week.html?id=3640\n

Algebraic Geometry Learning Seminar: Toric varieties

Alberto Cobos

Toric Fano varieties, reflexive polytopes and mirror symmetry

Wed, 19 May at 15:00
online in Google Meet (please e-mail Evgeny for the link)
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20210520T000000 20210520T005000 SP2RC/ESPOS Speaker: (University of Glasgow, School of Physics & Astronomy (UK))\n Title: \n URL: /maths/sem_week.html?id=3607\n

SP2RC/ESPOS

(University of Glasgow, School of Physics & Astronomy (UK))

Thu, 20 May at 00:00
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