This talk, which is based on two joint works, one with Pedro
Salomão and Richard Siefring and another with Michael Hutchings and
Vinicius Ramos, revolves around the role that restrictions on the
knot types of periodic Reeb orbits imposed by the...
The ubiquity of substructures in protoplanetary discs has opened
debate regarding the alignment of planet formation timescales with
protostellar disc evolution. Under the hypothesis of the planetary
interpretation, a robust conclusion is that a...
I will prove Gromov's conjecture that every 3-manifold of
positive scalar curvature contains a short closed geodesic. The
proof uses Min-Max theory of minimal surfaces and a combinatorial
version of mean curvature flow. Time permitting, I will...
Over the past 50 years, cryptographers have constructed a number
of surprising and important primitives like public-key encryption,
which allows strangers to communicate privately even if
eavesdroppers hear everything they say. However, there are...
For Pauli stabilizer codes—such as surface codes and color
codes—transversal logical gates are strongly constrained by the
Bravyi–König bound. In particular, implementing a non-Clifford gate
transversally (as required for universality) demands three...
The group of Hamiltonian diffeomorphisms , equipped with the
Hofer metric , is a central object in symplectic topology. A
landmark result by Polterovich and Shelukhin established the
profound geometric complexity of this group for surfaces and
their...
Kudla and Millson proved in the 80's that the generating series
of special cycles in orthogonal and unitary Shimura varieties are
modular forms and a well-established conjecture of Kudla asks about
extensions to toroidal compactifications. In this...
I'll talk about the o-minimal structures R_LN and R_{LN,exp}
where one has an effective form of the finiteness property of
o-minimality. Unlike the more classical structure of Pfaffian
function, R_{LN,exp} contains the period integrals for
aribtrary...
Among many things, dark matter could be made of new fundamental
or composite particles, which may feebly interact with nuclei or
electrons (“baryons”), as well as with themselves. Cosmological
observables are a promising avenue to test such...
Ricci solitons, introduced by R. Hamilton in the mid-80s, are
self-similar solutions to the Ricci flow and natural
generalizations of Einstein manifolds. Shrinking Ricci solitons, in
particular, model Type I singularities of the Ricci flow
and...
