Shenghao Yang @shenghao_yang
PhD student @UWCheritonCS. Machine learning and optimization over graphs. https://t.co/zUfRiSeMCZ cs.uwaterloo.ca/~s286yang Waterloo, Ontario Joined February 2021-
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Positional Attention is accepted at ICML 2025! Thanks to all co-authors for the hard work (64 pages). If you’d like to read the paper, check the quoted post. That's a comprehensive study on the expressivity for parallel algorithms, their in- and out-of-distribution learnability,…
Positional Attention is accepted at ICML 2025! Thanks to all co-authors for the hard work (64 pages). If you’d like to read the paper, check the quoted post. That's a comprehensive study on the expressivity for parallel algorithms, their in- and out-of-distribution learnability,…
Our new work Spectral Journey arxiv.org/abs/2502.08794 shows a surprising finding: when a 2-layer Transformer is learned to predict the shortest path of a given graph, 1️⃣it first implicitly computes the spectral embedding for each edge, i.e. eigenvectors of Normalized Graph…
My PhD thesis is now available on UWspace: uwspace.uwaterloo.ca/items/291d10bc…. Thanks to my advisors @kfountou and Aukosh Jagannath for their support throughout my PhD. We introduce a statistical perspective for node classification problems. Brief details are below.
"Energy continuously flows from being concentrated, to becoming dispersed, spread out, wasted and useless." ⚡➡️🌬️ Sharing our work on the inability of softmax in Transformers to _robustly_ learn sharp functions out-of-distribution. Together w/ @cperivol_ @fedzbar & Razvan!
Positional Attention: Out-of-Distribution Generalization and Expressivity for Neural Algorithmic Reasoning We propose calculating the attention weights in Transformers using only fixed positional encodings (referred to as positional attention). These positional encodings remain…
I wrote a blog @Medium on "Random Data and Graph Neural Networks" Link: medium.com/@kimon.fountou… I cover a range of topics: 1. How a single averaging graph convolution changes the mean and variance of the data. 2. How it improves linear classification. 3. How multiple…
For those participating in the Complex Networks in Banking and Finance Workshop, I’ll be presenting our work on Local Graph Clustering with Noisy Labels tomorrow at 9:20 AM EDT at the Fields Institute. Hope to see you there :) arxiv.org/abs/2310.08031
Paper: Analysis of Corrected Graph Convolutions We study the performance of a vanilla graph convolution from which we remove the principal eigenvector to avoid oversmoothing. 1) We perform a spectral analysis for k rounds of corrected graph convolutions, and we provide results…
.@backdeluca is at ICLR and he will present his joint work with @shenghao_yang on "Local Graph Clustering with Noisy Labels". Date: Friday 10th of May. Time: 4:30pm - 6:30pm CEST. Place: Halle B #175.
Emergence in LLMs is a mystery. Emergence in physics is linked to phase transitions. We identify a phase transition between semantic and positional learning in a toy model of dot-product attention. Very excited about this one! arxiv.org/pdf/2402.03902…
The November issue of SIAM News is now available! In this month's edition, @n_veldt finds that even a seemingly minor generalization of the standard #hypergraph cut penalty yields a rich space of theoretical questions and #complexity results. Check it out! sinews.siam.org/Details-Page/g…
Graph Attention Retrospective is live at JMLR jmlr.org/papers/v24/22-…. The revised version has additional results: 1) Beyond perfect node classification, we provide a positive result on graph attention’s robustness against structural noise in the graph. In particular, our…
Graph Attention Retrospective is live at JMLR jmlr.org/papers/v24/22-…. The revised version has additional results: 1) Beyond perfect node classification, we provide a positive result on graph attention’s robustness against structural noise in the graph. In particular, our…
Here's our new work on the optimality of message-passing architectures for node classification on sparse feature-decorated graphs! Thanks to my advisors and co-authors @kfountou and Aukosh Jagannath. Details within the quoted tweet.
Here's our new work on the optimality of message-passing architectures for node classification on sparse feature-decorated graphs! Thanks to my advisors and co-authors @kfountou and Aukosh Jagannath. Details within the quoted tweet.
Alright, I have some important news (at least for me). Now there exists an accelerated personalized PageRank method which is strongly local!! It's running time does not depend on the size of the graph but rather only on the number of nonzeros at uwspace.uwaterloo.ca/handle/10012/1……
SIAM Conference on Applied and Computational Discrete Algorithms (ACDA23) May 31 – June 2, 2023 Seattle, Washington, U.S. New submission due dates: Registering a submission: Jan 16; Paper submission deadline; Jan 23.
SIAM Conference on Applied and Computational Discrete Algorithms (ACDA23), May 31 -- June 2, 2023 siam.org/conferences/cm… Important dates: Short Abstract and Submission Registration: Jan 9, 2023 Papers and Presentations-without-papers: Jan 16, 2023 #SIAMACDA23
Open problem: accelerated methods for l1-regularized PageRank. proceedings.mlr.press/v178/open-prob…
Does it matter where you place the graph convolutions (GCs) in a deep network? How much better is a deep GCN vs an MLP? When are 2 or 3 GCs better than 1 GC? We answer those for node class., and a nonlinearly separable contextual stochastic block model. arxiv.org/pdf/2204.09297….
New video with Prof. @kfountou explaining his paper "Graph Attention Retrospective" is now available! youtu.be/duWVNO8_sDM Check it out to learn what GATs can and cannot learn for node classification in a stochastic block model setting!
Tomorrow's GraphML discussion will be with Prof @kfountou about his paper "Graph Attention Retrospective": arxiv.org/abs/2202.13060 One of the most central topics! Sign up to join on Zoom at 11am EST hannes-stark.com/logag-reading-… With Amit Levi @shenghao_yang @aseemrb Aukosh Jagannath
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