Geometric Deep Learning (Part 1)

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See Part 2 here:

Slides can be found on:

0:00 Introduction
4:00 5Gs of Geometric Deep Learning
9:10 Invariances in Deep Learning Architectures
17:07 Knowing symmetries = Generalization
39:58 Mathematical Definition of Symmetries
46:12 Definition of Mathematical Group
48:45 Group action
1:00:22 Equivariance vs Invariance
1:08:58 Clarification of Mathematical symbols
1:11:09 Caveat: Invariance/Equivariance should not be applied at all levels of the network
1:13:28 Convolution Neural Networks (Translational Invariance/Equivariance)
1:21:50 Role of Data Augmentation
1:30:22 Modelling other invariances into CNNs
1:40:18 Graph Neural Networks (Permutation Invariance/Equivariance)
1:49:52 Graphs can be permuted arbitrarily
1:56:22 Q&A on GNNs
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At 44:00, it is actually an automorphism, a subset of isomorphism.

For an isomorphism, you do not need to have the mapped output domain be equal to the range of the input, but in automorphism you must.

johntanchongmin