<< Monday, September 17, 2018 >>

## Monday, September 17, 2018

Seminar | September 17 | 11:10 a.m.-12:30 p.m. | 489 Minor Hall

Vivek Labhishetty's Abstract
Retinal-Conjugate Surfaces: The Blur Horopter
When we fixate at an object, the image of that object is brought to sharp focus on the fovea due to the eye’s accommodation. Other objects in the periphery may be farther or nearer than best focus on those parts of the retina. We measured the shape of surface of best focus in the world as the eye accommodates to...   More >

### Combinatorics Seminar: Divisors on matroids and their volumes

Seminar | September 17 | 12-1 p.m. | 939 Evans Hall

Christopher Eur, UC Berkeley

Department of Mathematics

The classical volume polynomial in algebraic geometry measures the degrees of ample (and nef) divisors on a smooth projective variety. We introduce an analogous volume polynomial for matroids, give a complete combinatorial formula, and show that it is a valuation under matroid polytope subdivisions. For a realizable matroid, we thus obtain an explicit formula for the classical volume polynomial...   More >

### PF Lunch Seminar:

Seminar | September 17 | 12-2 p.m. | 648 Evans Hall

Antoine Ferey; Malka Guillot

Antoine Ferey - "Optimal taxation and tax complexity with misperceptions"

Malka Guillot - "Who Paid the 75% Tax onMillionaires?
Optimisation of Salary Incomes and Incidence in France

by September 13.

### Information decomposition

Seminar | September 17 | 12-1 p.m. | 560 Evans Hall

Juergen Jost, MPI for Mathematics in the Sciences, Leipzig

In many situations, two or more sources have some information about a target. For instance, sensory input and context information can jointly determine the firing pattern of a neuron. Since the information from the two sources is typically not identical, one wishes to decompose it in those parts that are unique to each source, what is shared between them and what is complementary, that is,...   More >

### Contemplating Loss: Photography Workshop

Workshop | September 17 | 1-4 p.m. |  UC Botanical Garden

Botanical Garden

Where better to bring our grief than the garden? In this contemplative photography workshop, we will observe Nature’s teachings on letting go, and we will use the camera as a trusted guide who can navigate us safely through the rugged terrain of grief.

$80 /$75 UCBG members. Full series $300 /$290 UCBG members

or by calling 510-664-7606

### Seminar 211, Economic History: Reconstruction Aid, Public Infrastructure, and Economic Development

Seminar | September 17 | 2-3:30 p.m. | 597 Evans Hall

Michela Giorcelli, UCLA

Department of Economics

### CANCELLED -- Exposure to Opposing Views Can Increase Political Polarization: Evidence from a Large-Scale Field Experiment on Social Media

Seminar | September 17 | 2-3:30 p.m. | 820 Barrows Hall | Canceled

Chris Bail, Douglas and Ellen Lowey Associate Professor of Sociology and Public Policy, Duke University

THIS EVENT HAS BEEN CANCELLED DUE TO TRAVEL CHALLENGES RELATED TO HURRICANE FLORENCE. PLEASE STAY TUNED TO THE MATRIX WEBSITE FOR UPDATES: HTTP://MATRIX.BERKELEY.EDU. THANK YOU.

### String-Math Seminar: GPV invariants and Dehn surgery

Seminar | September 17 | 2-3 p.m. | 402 LeConte Hall

Ciprian Manolescu, UCLA

Department of Mathematics

Gukov, Putrov and Vafa postulated the existence of some 3-manifold invariants, obtained by counting BPS states in the $$3d$$, $$N=2$$ theory $$T[M_3]$$. The GPV invariants take the form of power series converging in the unit disk, and whose radial limits at the roots of unity give the Witten-Reshetikhin-Turaev invariants. Furthermore, these power series have integer coefficients, and should admit...   More >

### Jesse Zymet, "Lexical propensities in phonology: Corpus and experimental evidence, grammar, and learning"

Colloquium | September 17 | 3:10-5 p.m. | 370 Dwinelle Hall

Jesse Zymet, UC Berkeley

Department of Linguistics

Traditional theories of phonological variation propose that morphemes be encoded with descriptors such as [+/- Rule X], to capture which of them participate in a variable process. More recent theories predict that individual morphemes can have lexical propensities: idiosyncratic, gradient rates at which they participate in a process—e.g., [0.7 Rule X]. In this talk, I argue that such propensities...   More >

### Differential Geometry Seminar: Quantization in geometric pluripotential theory

Seminar | September 17 | 3:10-4 p.m. | 939 Evans Hall

Tamás Darvas, University of Maryland

Department of Mathematics

Suppose $(X, \omega )$ is a Kähler manifold induced by an ample line bundle $(L, X)$. We introduce $L^p$-type Finsler structures on the space of holomorphic sections of $L^k$, and show that the resulting metric spaces quantize the $L^p$-Mabuchi metric structures on the space of Kähler metrics, up to their completion. This is joint work with C.H. Lu and Y.A. Rubinstein.

### Arithmetic Geometry and Number Theory RTG Seminar: Supersingular twistor space

Seminar | September 17 | 3:10-5 p.m. | 784 Evans Hall

Daniel Bragg, UC Berkeley

Department of Mathematics

We will describe how the crystalline cohomology of a supersingular K3 surface gives rise to certain one-parameter families of K3 surfaces, which we call supersingular twistor spaces. Our construction relies on the special behavior of $p$-torsion classes in the Brauer group of a supersingular K3 surface, as well as techniques coming from the study of derived categories and Fourier–Mukai...   More >

### Modern Surveillance: Living "Under His Eye": An On the Same Page panel

Panel Discussion | September 17 | 3:30-5 p.m. | Wheeler Hall, 315 (Maude Fife)

Catherine Crump, Professor, Berkeley Law; Kelli Moore, Professor, NYU Steinhardt Department of Media, Culture and Communication; Jason Wittenberg, Professor, UCB Department of Political Science

Cecilia Mo, Professor, UCB Political Science Department

College of Letters & Science

What are the various social, legal and ethical implications of technological advances that make it easier to be watched, and how are different groups pushing for and against policies that would govern the limits of state surveillance?

Free and open to all on a first-come, first-seated basis.

### Seminar 208, Microeconomic Theory: "Single-Crossing Differences on Distributions"

Seminar | September 17 | 4-5:30 p.m. | 639 Evans Hall

SangMok Lee, Washington University in St. Louis

Department of Economics

Co-Authored with Navin Kartik and Daniel Rappoport

### Molecular Chaperone Functions in Protein Folding and Quality Control

Seminar | September 17 | 4-5 p.m. | 106 Stanley Hall

F. Ulrich Hartl, Max Planck Institute of Biochemistry, Martinsried, Germany

College of Chemistry

### Design Field Notes: Kitty Yeung

Seminar | September 17 | 4-5 p.m. | 220 Jacobs Hall

Each informal talk in this pop-up series brings a design practitioner to a Jacobs Hall teaching studio to share ideas, projects, and practices.

This week, creative technologist Kitty Yeung will be speaking about Tech-Fashion Designs and the Wearables Industry

### Seminar 271, Development: "The Treatment Effect Elasticity of Demand: Estimating the welfare losses from groundwater depletion in India"

Seminar | September 17 | 4-5:30 p.m. | 648 Evans Hall

John Loeser, UC Berkeley, ARE

Department of Economics

### Analysis and PDE Seminar: A proof of the instability of AdS spacetime for the Einstein–massless Vlasov system.

Seminar | September 17 | 4:10-5 p.m. | 740 Evans Hall

Georgios Moschidis, Berkeley

Department of Mathematics

The AdS instability conjecture is a conjecture about the initial value problem for the Einstein vacuum equations with a negative cosmological constant. It states that there exist arbitrarily small perturbations to the initial data of the AdS spacetime which, under evolution by the vacuum Einstein equations with reflecting boundary conditions on conformal infinity, lead to the formation of black...   More >

### SLAM: A Career in Research, Publishing and Posting: How a Twitter-obsessed Graduate Student Took the Reins of the Preprint Movement in Chemistry

Seminar | September 17 | 5:30-6:30 p.m. | 106 Stanley Hall

Marshall Brennan, ChemRxiv