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April 16, 2018


Monday, April 16, 2018

Seminars in Research in Biochemistry and Molecular Biology
12:00 PM - 1:00 PM

Bloomberg School of Public Health

Seminars in Research in Biochemistry and Molecular Biology
Graduate Seminar on Injury Research and Policy Home Injuries
12:10 PM - 1:20 PM

The Front Lines of Home Safety: Perspectives from the Baltimore City Fire Department

Chief Niles R. Ford
Baltimore City Fire Department

For more information contact Edith Jones
[multiple] Biostatistics Seminar
12:15 PM - 1:15 PM

Bloomberg School of Public Health

Biostatistics Seminar "Causal Inference via Convex Optimization" Dr. Stefan Wager, Assistant Professor Operations, Information and Technology Stanford Graduate School of Business
Biostatistics Help: Faculty, Staff, Pre-MD and Post-Doc Walk-In Clinic
1:00 PM - 2:00 PM

Biostatistics consulting is available to all Johns Hopkins University faculty, staff, pre-MDs and post-docs conducting clinical and translational research. 1:00 – 2:00 PM Wolfe Street Building Room: E3144
Yueh-Ju Lin "Deformations of Q-curvature."
4:00 PM - 5:00 PM


Speaker: Yueh-Ju Lin, (Princeton) Abstract: Stability (local surjectivity) and rigidity of the scalar curvature have been studied in an early work of Fischer-Marsden on ``vacuum static spaces''. Inspired by this line of research, we seek similar properties for Q-curvature by studying ``Q-singular spaces'', which were introduced by Chang-Gursky-Yang. In this talk, we investigate deformation problems of $Q$-curvature on closed Riemannian manifolds with dimensions $n\geq 3$. In particular, we prove local surjectivity for non-$Q$-singular spaces and local rigidity of flat manifolds. For global results, we show that any smooth functions can be realized as a $Q$-curvature on generic $Q$-flat manifolds. However, a locally conformally flat metric on $n$-tori with nonnegative $Q$-curvature has to be flat. This is joint work with Wei Yuan.
Dimitri Zaganidis "On a (∞,2)-category of homotopy coherent adjunctions in an ∞-cosmos.'"
4:30 PM - 5:30 PM


Speaker: Dimitri Zaganidis, EPFL Abstract: Riehl and Verity initiated a program to study the category theory of (∞,1)-categories in a model-independent way, through the study of ∞-cosmoi. Homotopy coherent monads in an ∞ -cosmos are of particular interest since they determine an Eilenberg-Moore object of (homotopy coherent) algebras. In this talk, I will generalize the graphical calculus of Riehl and Verity to provide a combinatorial description of the simplicial categories Adjhc[n] and Mndhc[n]. They encode homotopy coherent diagrams of homotopy coherent adjunctions and monads of the shape of the simplex Δ[n], and in particular for n=1 , provide appropriate definitions for homotopy coherent morphisms of adjunctions and monads. I will briefly introduce weak complicial sets and show that the nerve induced by Adjhc[−]:Δ→sSet−Cat gives rise to an (∞,2)-category of homotopy coherent adjunctions. If time permits, I will discuss a related conjecture for homotopy coherent monads.

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