Nov 18 2020

Balls and Bins and Icebergs

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Wednesday, November 18, 2020
11:00 AM - 12:00 PM
Type: Seminars | Theoretical Computer Science Seminar
Presenter(s): Martin Farach-Colton - Rutgers University
Organizer(s): Sepehr Assadi || Swastik Kopparty
Abstract: Balls and bins games are a standard technique for analyzing hashing algorithms. Backyards are a technique for making hash tables faster. We give a balls and bins analysis of
Nov 18 2020

Classical Mechanics, Symplectic Geometry, Combinatorics

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Wednesday, November 18, 2020
12:15 PM - 1:15 PM
Type: Seminars | Graduate Combinatorics Seminar
Presenter(s): Robert Dougherty Bliss - Rutgers University
The well-exploited theory of SIMPLE continued fractions has produced some dazzling identities and wonderful irrationality proofs. The often-overlooked theory of GENERAL continued fractions is harder to champion, but just as,
Nov 16 2020

Strategyproofness You Can Explain to Your Grandmother

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Monday, November 16, 2020
4:00 PM - 5:00 PM
Type: Seminars | DIMACS Matching Reading Group
Presenter(s): Clay Thomas - Princeton University
Obvious strategyproofness (OSP) has emerged in recent years as a "gold standard" for mechanisms which must interact with agents who are not hyper-rational [Li]. Very briefly, a mechanism is OSP
Nov 13 2020

Auditing and Controlling Algorithmic Bias

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Friday, November 13, 2020
10:00 AM - 11:00 AM
Type: Seminars | DATA-INSPIRE TRIPODS Seminars
Presenter(s): Vivek Singh - Rutgers University
Today Artificial Intelligence algorithms are used to make multiple decisions affecting human lives, and many such algorithms, such as those used in parole decisions, have been reported to be biased.
Nov 12 2020

Rethinking the Foundations of Mathematics and its Practical Consequences

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Thursday, November 12, 2020
5:00 PM - 6:00 PM
Type: Seminars | Experimental Math Seminar
Presenter(s): Jonathan Lenchner - IBM
Organizer(s): Doron Zeilberger || Robert Dougherty Bliss
In this talk I shall argue that we should recast the foundations of mathematics using the foundational notion of a bit, rather than the much more ambiguous notion of a
Nov 11 2020

On Communicating Over Networks Without Revealing Their Topology

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Wednesday, November 11, 2020
11:00 AM - 12:00 PM
Type: Seminars | Theoretical Computer Science Seminar
Presenter(s): Marshall Ball - Columbia University
Organizer(s): Swastik Kopparty || Sepehr Assadi
I will speak about some recent developments in topology-hiding communication (and computation). A topology-hiding broadcast protocol for class of networks, allows a party to send a message to every other
Nov 11 2020

Triangle-Intersecting Families of Graphs

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Wednesday, November 11, 2020
12:15 PM - 1:15 PM
Type: Seminars | Graduate Combinatorics Seminar
Presenter(s): Rashmika Goswami - Rutgers University
We say a family of graphs is triangle-intersecting if the intersection of any two graphs in the family contains a triangle. If we consider graphs on n vertices, how large
Nov 11 2020

Workshop on Co-Development of Computer Science and Law

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Wednesday, November 11, 2020 - Friday, November 13, 2020
12:00 PM - 5:00 PM
Type: Workshops
Organizer(s): David Pennock | Joshua Kroll | Joan Feigenbaum
Sophisticated computation embedded in a variety of sociotechnical systems has become an essential enabler of everyday life As such systems have become more powerful and more present the interdisciplinary research area of computer science and law has begun to take shape This workshop will explore establishing rigorous foundations for this
Nov 09 2020

Discussion of: Two-sided Matching Markets with Correlated Random Preferences Have Few Stable Pairs

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Monday, November 9, 2020
4:00 PM - 5:00 PM
Type: Seminars | DIMACS Matching Reading Group
The paper to be presented is: Title: Two-sided Matching Markets with Correlated Random Preferences Have Few Stable Pairs Authors: Hugo Gimbert, Claire Mathieu, Simon Mauras Paper Abstract: Stable matching in
Nov 05 2020

Noncommutative Catalan Numbers, Orthogonal Polynomials and Beyond

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Thursday, November 5, 2020
5:00 PM - 6:00 PM
Type: Seminars | Experimental Math Seminar
Presenter(s): Vladimir Retakh - Rutgers University
Organizer(s): Doron Zeilberger || Robert Dougherty Bliss
I will discuss an approach to (generalized) orthogonal polynomials over noncommutative rings by using infinite Hankel matrices. As an example, I will consider properties of Hankel matrices consisting of noncommutative
Nov 04 2020

Faster K-clique Counting in Bounded Arboricity Graphs

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Wednesday, November 4, 2020
11:00 AM - 12:00 PM
Type: Seminars | Theoretical Computer Science Seminar
Presenter(s): Tayla Eden - Massachusetts Institute of Technology
Organizer(s): Sepehr Assadi || Swastik Kopparty
Abstract: I will discuss a sublinear-time algorithm for approximately counting the number of k-cliques in bounded arboricity graphs. Counting cliques (and triangles in particular) is a fundamental task in graph
Oct 29 2020

On Partial Differential Encodings of Boolean Functions

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Thursday, October 29, 2020
5:00 PM - 6:00 PM
Type: Seminars | Experimental Math Seminar
Presenter(s): Edinah Gnang - Johns Hopkins University
We describe how combinatorial enumeration and listing problem in connection with structural properties of hypermatrices determine critical aspect of the complexity of Boolean function. The talk will not assume familiarity
Oct 28 2020

Planar Distance Oracles

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Wednesday, October 28, 2020
11:00 AM - 12:00 PM
Type: Seminars | Theoretical Computer Science Seminar
Presenter(s): Seth Pettie - University of Michigan
Organizer(s): Swastik Kopparty || Sepehr Assadi
We consider the problem of preprocessing a weighted planar graph in order to answer exact distance and shortest path queries. As in the recent algorithms of Cohen-Addad et al. (2017),
Oct 28 2020

Partition Identities, Q-series Identities, and Experimental Mathematics

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Wednesday, October 28, 2020
12:15 PM - 1:15 PM
Type: Seminars | Graduate Combinatorics Seminar
Presenter(s): Matthew Russell - Rutgers University
I will talk about partition identities and q-series identities (and especially identities in the intersection of those two sets), and the use of computer algebra systems in experimentally discovering them.
Oct 27 2020

Using Satellite Imagery and Deep Learning to Target Aid in Data-sparse Contexts

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Tuesday, October 27, 2020
10:00 AM - 11:00 AM
Type: Seminars | DATA-INSPIRE TRIPODS Seminars
Presenter(s): Woojin Jung - Rutgers University
Aid policy has the potential to alleviate global poverty by targeting areas of concentrated need. A critical question remains, however, over whether aid is reaching the areas of most need.
Oct 26 2020

Discussion of Two Papers on Preference Misrepresentation in Matching

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Monday, October 26, 2020
4:00 PM - 5:00 PM
Type: Seminars | DIMACS Matching Reading Group
This week will cover two papers: Title 1: An Experimental Investigation of Preference Misrepresentation in the Residency Match Authors: Alex Rees-Jones and Samuel Skowronek Paper Abstract: The development and deployment
Oct 23 2020

Mechanism Design and Data Science

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Friday, October 23, 2020
10:00 AM - 11:00 AM
Type: Seminars | DATA-INSPIRE TRIPODS Seminars
Presenter(s): Jason Hartline - Northwestern University
Computer systems have become the primary mediator of social and economic interactions. A defining aspect of such systems is that the participants have preferences over system outcomes and will manipulate
Oct 22 2020

On Christol's Conjecture

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Thursday, October 22, 2020
5:00 PM - 6:00 PM
Type: Seminars | Experimental Math Seminar
Presenter(s): Christoph Koutschan - Austrian Academy of Sciences
Diagonals of rational functions naturally occur in many applications, such as lattice statistical mechanics and enumerative combinatorics. In the mid 1980's Gilles Christol famously conjectured that any globally bounded D-finite
Oct 21 2020

Recent Applications of Expanders to Graph Algorithms

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Wednesday, October 21, 2020
11:00 AM - 12:00 PM
Type: Seminars | Theoretical Computer Science Seminar
Presenter(s): Thatchaphol Saranurak - University of Michigan
Organizer(s): Swastik Kopparty || Sepehr Assadi
Expanders enable us to make exciting progress in several areas of graph algorithms in the last few years. As examples, we show (1) the first deterministic almost-linear time algorithms for
Oct 19 2020

Discussion of: Two-Sided Random Matching Markets: Ex-Ante Equivalence of the Deferred Acceptance Procedures

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Monday, October 19, 2020
4:00 PM - 5:00 PM
Type: Seminars | DIMACS Matching Reading Group
The paper to be presented is: Title: Two-Sided Random Matching Markets: Ex-Ante Equivalence of the Deferred Acceptance Procedures Author: Simon Mauras Paper Abstract: Stable matching in a community consisting of