66 research outputs found
Asymptotic metrics for SU(N)-monopoles with maximal symmetry breaking
We compute the asymptotic metrics for moduli spaces of SU(N) monopoles with
maximal symmetry breaking. These metrics are exponentially close to the exact
monopole metric as soon as, for each simple root, the individual monopoles
corresponding to that root are well separated. We also show that the estimates
can be differentiated term by term in natural coordinates, which is a new
result even for SU(2) monopoles.Comment: 26 pages, AMS-Latex; comparison of metrics done differently and in
greater detail; version submitte
Going Deeper with Spectral Embeddings
To make sense of millions of raw data and represent them efficiently,
practitioners rely on representation learning. Recently, deep connections have
been shown between these approaches and the spectral decompositions of some
underlying operators. Historically, explicit spectral embeddings were built
from graphs constructed on top of the data. In contrast, we propose two new
methods to build spectral embeddings: one based on functional analysis
principles and kernel methods, which leads to algorithms with theoretical
guarantees, and the other based on deep networks trained to optimize principled
variational losses, which yield practically efficient algorithms. Furthermore,
we provide a new sampling algorithm that leverages learned representations to
generate new samples in a single step
Economic Networks: Theory and Computation
This textbook is an introduction to economic networks, intended for students
and researchers in the fields of economics and applied mathematics. The
textbook emphasizes quantitative modeling, with the main underlying tools being
graph theory, linear algebra, fixed point theory and programming. The text is
suitable for a one-semester course, taught either to advanced undergraduate
students who are comfortable with linear algebra or to beginning graduate
students.Comment: Textbook homepage is
https://quantecon.github.io/book-networks/intro.htm
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