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MDLW01 | Joan Bruna | On the Sample Complexity of Learning Under Invariance and Geometric Stability Analytics Table

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MDLW01 | Dr. Joan Bruna | On the Sample Complexity of Learning Under Invariance and Geometric Stability Speaker: Dr Joan Bruna (New York University) Date: 11th Aug 2021 - 10:30 to 11:00 Venue: INI Seminar Room 1 Title: On the Sample Complexity of Learning Under Invariance and Geometric Stability Event: (MDLW01) Theory of deep learning Abstract: Many supervised learning problems involve high-dimensional data such as images, text, or graphs. In order to make efficient use of data, it is often useful to leverage certain geometric priors in the problem at hand, such as invariance to translations, permutation subgroups, or stability to small deformations. We study the sample complexity of learning problems where the target function presents such invariance and stability properties, by considering spherical harmonic decompositions of such functions on the sphere. We provide non-parametric rates of convergence for kernel methods, and show improvements in sample complexity by a factor equal to the size of the group when using an invariant kernel over the group, compared to the corresponding non-invariant kernel. These improvements are valid when the sample size is large enough, with an asymptotic behavior that depends on spectral properties of the group. Finally, these gains are extended beyond invariance groups to also cover geometric stability to small deformations, modeled here as subsets (not necessarily subgroups) of permutations. Joint work with Alberto Bietti (NYU) and Luca Venturi (NYU) ------------------- FOLLOW US 🌐| Website: https://www.newton.ac.uk 🎥| Main Channel: https://www.youtube.com/@isaacnewtoninstitute 🐦| Twitter: https://twitter.com/NewtonInstitute 💬| Facebook: https://www.facebook.com/newton.institute 📷| Instagram: https://www.instagram.com/isaacnewtoninstitute 🔗| LinkedIn: https://www.linkedin.com/company/isaac-newton-institute-for-mathematical-sciences SEMINAR ROOMS 🥇| INI Seminar Room 1: https://www.youtube.com/@iniseminarroom1 🥈| INI Seminar Room 2: https://www.youtube.com/@iniseminarroom2 🛰️| INI Satellite Events: https://www.youtube.com/@inisatellite ABOUT The Isaac Newton Institute is a national and international visitor research institute. It runs research programmes on selected themes in mathematics and the mathematical sciences with applications over a wide range of science and technology. It attracts leading mathematical scientists from the UK and overseas to interact in research over an extended period. 👉 Learn more about us and our events here: https://www.newton.ac.uk

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