Brief Bio
I am a professor of computer science at Columbia. I am also the director of the NSF AI Institute for ARtificial and Natural Intelligence (ARNI).
I was previously the co-founder and inaugural research director of the Vector Institute for Artificial Intelligence, and I have been a visiting researcher at Amazon, Google, Meta and Spotify, and founded and ran a startup company, Smartfinance.
I am a Canadian Institute for Advanced Research AI Chair and on the Advisory Board of the Neural Information Processing Society. I received an AI Lifetime Achievement Award (CAIA) and a Pioneer of AI Award (NVIDIA).
Research & Teaching
By developing learning algorithms that flexibly adapt across tasks and environments, our research aims to create AI systems that are reliable, controllable, and trustworthy. Zgroup investigates how machine learning models can integrate diverse modalities, continually acquire new skills, quantify their own uncertainty, and remain robust in unfamiliar settings. Other interests include algorithmic fairness, interpretability, computational neuroscience, and applications of machine learning to high-stakes scientific and societal decisions.
I typically recruit one or two PhD students to join Zgroup each year. Prospective PhD students should apply to the PhD program. Due to the volume of email we receive, we unfortunately cannot respond to emails about applications.
In Fall 2026 I will teach two courses: Neural Networks & Deep Learning (COMS 4776), and Continual Learning & Memory Models (COMS 6998).
Current Zgroup PhD Students and Postdocs
Graduated PhD Students and Former Postdocs
Representative Papers
The papers below are representative examples drawn from our main research directions. Some develop systems that flexibly span language, vision, and real-world reasoning. Others tackle how to acquire new skills efficiently and stably as the world changes. Another strand develops models that know what they know — and what they don't — and provides reliable performance guarantees. A final strand builds systems that handle scenarios beyond their training data, producing trustworthy responses to ambiguous inputs.
2026
Few-Shot Design Optimization by Exploiting Auxiliary Information
Arjun Mani, Carl Vondrick, Richard Zemel
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Level Up: Defining and Exploiting Transitional Problems for Curriculum Learning
Zhenwei Tang, Amogh Inamdar, Ashton Anderson, Richard Zemel
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Tell Me What To Learn: Generalizing Neural Memory to be Controllable in Natural Language
Max S. Bennett, Thomas P. Zollo, Richard Zemel
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Unsupervised Confidence Calibration for Reasoning LLMs from a Single Generation
Thomas Zollo, Jimmy Wang, Richard Zemel
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Whom to Query for What: Adaptive Group Elicitation via Multi-Turn LLM Interactions
Ruomeng Ding, Tianwei Gao, Thomas P. Zollo, Eitan Bachmat, Richard Zemel, Zhun Deng
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2025
Adaptive Elicitation of Latent Information Using Natural Language
Jimmy Wang, Thomas Zollo, Richard Zemel, Hongseok Namkoong
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Confidence Calibration in Vision-Language-Action Models
Thomas P Zollo, Richard Zemel
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Guiding LLM Decision-Making with Fairness Reward Models
Zara Hall, Melanie Subbiah, Thomas P Zollo, Kathleen McKeown, Richard Zemel
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Let the Experts Speak: Improving Survival Prediction & Calibration via Mixture-of-Experts Heads
Todd Morrill, Aahlad Puli, Murad Megjhani, Soojin Park, Richard Zemel
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QuEst: Enhancing Estimates of Quantile-Based Distributional Measures Using Model Predictions
Zhun Deng, Thomas P Zollo, Benjamin Eyre, Amogh Inamdar, David Madras, Richard Zemel
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Replay Can Provably Increase Forgetting
Yasaman Mahdaviyeh, James Lucas, Mengye Ren, Andreas S. Tolias, Richard Zemel, Toniann Pitassi
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Schemex: Discovering Structural Abstractions from Examples
Sitong Wang, Samia Menon, Dingzeyu Li, Xiaojuan Ma, Richard Zemel, Lydia B. Chilton
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Societal Alignment Frameworks Can Improve LLM Alignment
Karolina Stańczak, Nicholas Meade, Mehar Bhatia, Hattie Zhou, Konstantin Böttinger, Jeremy Barnes, Jason Stanley, Jessica Montgomery, Richard Zemel, Nicolas Papernot, Nicolas Chapados, Denis Therien, Timothy P. Lillicrap, Ana Marasović, Sylvie Delacroix, Gillian K. Hadfield, Siva Reddy
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Test-Time Warmup for Multimodal Large Language Models
Nikita Rajaneesh, Thomas Zollo, Richard Zemel
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Towards Effective Discrimination Testing for Generative AI
Thomas P. Zollo, Nikita Rajaneesh, Richard Zemel, Talia B. Gillis, Emily Black
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Towards Safety Reasoning in LLMs: AI-agentic Deliberation for Policy-embedded CoT Data Creation
Tharindu Kumarage, Ninareh Mehrabi, Anil Ramakrishna, Xinyan Zhao, Richard Zemel, Kai-Wei Chang, Aram Galstyan, Rahul Gupta, Charith Peris
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2024
Attribute Controlled Fine-tuning for Large Language Models: A Case Study on Detoxification
Tao Meng, Ninareh Mehrabi, Palash Goyal, Anil Ramakrishna, Aram Galstyan, Richard Zemel, Kai-Wei Chang, Rahul Gupta, Charith Peris
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Controlling the World by Sleight of Hand
Sruthi Sudhakar, Ruoshi Liu, Basile Van Hoorick, Carl Vondrick, Richard Zemel
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Improving Predictor Reliability with Selective Recalibration
Thomas P. Zollo, Zhun Deng, Jake C. Snell, Toniann Pitassi, Richard Zemel
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Integrating Present and Past in Unsupervised Continual Learning
Yipeng Zhang, Laurent Charlin, Richard Zemel, Mengye Ren
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Online Algorithmic Recourse by Collective Action
Elliot Creager, Richard Zemel
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Out of the Ordinary: Spectrally Adapting Regression for Covariate Shift
Benjamin Eyre, Elliot Creager, David Madras, Vardan Papyan, Richard Zemel
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Partial Federated Learning
Tiantian Feng, Anil Ramakrishna, Jimit Majmudar, Charith Peris, Jixuan Wang, Clement Chung, Richard Zemel, Morteza Ziyadi, Rahul Gupta
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Quantile Risk Control: A Flexible Framework for Bounding the Probability of High-Loss Predictions
Jake C. Snell, Thomas P. Zollo, Zhun Deng, Toniann Pitassi, Richard Zemel
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Toward Informal Language Processing: Knowledge of Slang in Large Language Models
Zhewei Sun, Qian Hu, Rahul Gupta, Richard Zemel, Yang Xu
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Whiteboard-of-Thought: Thinking Step-by-Step Across Modalities
Sachit Menon, Richard Zemel, Carl Vondrick
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2023
"I'm fully who I am": Towards centering transgender and non-binary voices to measure biases in open language generation
Anaelia Ovalle, Palash Goyal, Jwala Dhamala, Zachary Jaggers, Kai-Wei Chang, Aram Galstyan, Richard Zemel, Rahul Gupta
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Coordinated replay sample selection for continual federated learning
Jack Good, Jimit Majmudar, Christophe Dupuy, Jixuan Wang, Charith Peris, Clement Chung, Richard Zemel, Rahul Gupta
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Differentially private decoding in large language models
Jimit Majmudar, Christophe Dupuy, Charith Peris, Sami Smaili, Rahul Gupta, Richard Zemel
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Distribution-free statistical dispersion control for societal applications
Zhun Deng, Thomas Zollo, Jake Snell, Toniann Pitassi, Richard Zemel
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FLIRT: Feedback Loop In-context Red Teaming
Ninareh Mehrabi, Palash Goyal, Christophe Dupuy, Qian Hu, Shalini Ghosh, Richard Zemel, Kai-Wei Chang, Aram Galstyan, Rahul Gupta
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ICL Markup: Structuring in-context learning using soft-token tags
Marc-Etienne Brunet, Ashton Anderson, Richard Zemel
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JAB: Joint Adversarial Prompting and Belief Augmentation
Ninareh Mehrabi, Palash Goyal, Anil Ramakrishna, Jwala Dhamala, Shalini Ghosh, Richard Zemel, Kai-Wei Chang, Aram Galstyan, Rahul Gupta
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On the steerability of large language models toward data-driven personas
Junyi Li, Ninareh Mehrabi, Charith Peris, Palash Goyal, Kai-Wei Chang, Aram Galstyan, Richard Zemel, Rahul Gupta
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Prompt Risk Control: A flexible framework for bounding the probability of high-loss predictions
Thomas Zollo, Todd Morrill, Zhun Deng, Jake Snell, Toniann Pitassi, Richard Zemel
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Resolving ambiguities in text-to-image generative models
Ninareh Mehrabi, Palash Goyal, Apurv Verma, Jwala Dhamala, Varun Kumar, Qian Hu, Kai-Wei Chang, Richard Zemel, Aram Galstyan, Rahul Gupta
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Semantically informed slang interpretation
Zhewei Sun, Richard Zemel, Yang Xu
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SurfsUp: Learning fluid simulation for novel surfaces
Arjun Mani, Ishaan Preetam Chandratreya, Elliot Creager, Carl Vondrick, Richard Zemel
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Tokenization Matters: Navigating Data-Scarce Tokenization for Gender Inclusive Language Technologies
Anaelia Ovalle, Ninareh Mehrabi, Palash Goyal, Jwala Dhamala, Kai-Wei Chang, Richard Zemel, Aram Galstyan, Yuval Pinter, Rahul Gupta
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2022
Amortized Causal Discovery: Learning to infer causal graphs from time-series data
Sindy Lowe, David Madras, Richard Zemel, Max Welling
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Correlation and generalization under correlation shifts
Christina Funke, Paul Vicol, Kuan-Chieh Wang, Matthias Kummerer, Richard Zemel, Matthias Bethge
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Deep ensembles work, but are they necessary?
Taiga Abe, E. Kelly Buchanan, Geoff Pleiss, Richard Zemel, John Cunningham
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Implications of model indeterminacy for explanations of automated decisions
Marc-Etienne Brunet, Ashton Anderson, Richard Zemel
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Mapping the Multilingual Margins: Intersectional Biases of Sentiment Analysis Systems in English, Spanish, and Arabic
António Câmara, Nina Taneja, Tamjeed Azad, Emily Allaway, Richard Zemel
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2021
A computational framework for slang generation
Zhewei Sun, Richard Zemel, Yang Xu
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A PAC-Bayesian approach to generalization bounds for graph neural networks
Renjie Liao, Raquel Urtasun, Richard Zemel
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Bayesian few-shot classification with one-vs-each Polya-Gamma augmented Gaussian Processes
Jake Snell, Richard Zemel.
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Directly training joint energy-based models for conditional synthesis and calibrated prediction of multi-attribute data
Jacob Kelly, Richard Zemel, Will Grathwohl
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Environment inference for invariant learning
Elliot Creager, Jorn Jacobsen, Richard Zemel.
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Fairness and robustness in invariant learning: A case study in toxicity classification
Robert Adragna, Elliot Creager, David Madras, Richard Zemel
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Identifying and benchmarking natural out-of-context prediction problems
David Madras, Richard Zemel
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NP-DRAW: A non-parametric structured latent variable model for image generation
Xiaohui Zeng, Raquel Urtasun, Richard Zemel, Sanja Fidler, Renjie Liao
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On monotonic linear interpolation of neural network parameters
James Lucas, Juhan Bae, Michael Zhang, Stanislav Fort, Richard Zemel, Roger Grosse
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Online Unsupervised Learning of Visual Representations and Categories
Mengye Ren, Tyler R. Scott, Michael L. Iuzzolino, Michael C. Mozer, Richard Zemel
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SketchEmbedNet: Learning novel concepts by imitating drawings
Alex Wang, Mengye Ren, Richard Zemel
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Theoretical bounds on estimation error for meta-learning
James Lucas, Mengye Ren, Irene Kameni, Toni Pitassi, Richard Zemel
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Universal template for few-shot dataset generalization
Eleni Triantafillou, Hugo Larochelle, Richard Zemel, Vincent Dumoulin
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Variational Model Inversion Attacks
Kuan-Chieh Wang, Yan Fu, Ke Li, Ashish Khisti, Richard Zemel, Alireza Makhzani
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Wandering within a world: Online contextualized few-shot learning
Mengye Ren, Michael Iuzzolino, Michael Mozer, Richard Zemel
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2020
Causal modeling for fairness in dynamical systems
Elliot Creager, David Madras, Toni Pitassi, Richard Zemel
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Cutting out the middle-man: Training and evaluating energy-based models
Will Grathwohl, Jackson Wang, Jorn Jacobsen, David Duvenaud, Richard Zemel
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Optimizing long-term social welfare in recommender systems: A constrained matching approach
Martin Mladenov, Elliot Creager, O Ben-Porat, Kevin Swersky, Richard Zemel, Craig Boutilier
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Probing Few-Shot Generalization with Attributes
Mengye Ren, Eleni Triantafillou, Kuan-Chieh Wang, James Lucas, Jake Snell, Xaq Pitkow, Andreas S. Tolias, Richard Zemel
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Shortcut learning in deep neural networks
Robert Geirhos, Jörn-Henrik Jacobsen, Claudio Michaelis, Richard Zemel, Wieland Brendel, Matthias Bethge, Felix Wichmann
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Understanding the limitations of conditional generative models
Ethan Fetaya, Joern-Henrik Jacobsen, Will Grathwohl, Richard Zemel
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2019
A divergence minimization perspective on imitation learning methods
Seyed Kamyar Seyed Ghasemipour, Richard Zemel, Shane Gu
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Aggregated momentum: Stability through passive damping
James Lucas, Shengyang Sun, Richard Zemel, Roger Grosse
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Alchemy: A Quantum Chemistry Dataset for Benchmarking AI Models
Guangyong Chen, Pengfei Chen, Chang-Yu Hsieh, Chee-Kong Lee, Benben Liao, Renjie Liao, Weiwen Liu, Jiezhong Qiu, Qiming Sun, Jie Tang, Richard Zemel, Shengyu Zhang
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Dimensionality reduction for representing the knowledge of probabilistic models
Marc Law, Jake Snell, Amir-massoud Farahmand, Raquel Urtasun, Richard Zemel
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Efficient graph generation with graph recurrent attention networks
Renjie Liao, Yujia Li, Yang Song, Shenlong Wang, Charlie Nash, William Hamilton, David Duvenaud, Raquel Urtasun, Richard Zemel
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Excessive invariance causes adversarial vulnerability
Jörn-Henrik Jacobsen, Jens Behrmann, Richard Zemel, Matthias Bethge
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Fairness through causal awareness: Learning causal latent-variable models for biased data.
David Madras, Elliot Creager, Toni Pitassi, Richard Zemel
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Flexibly fair representation learning by disentanglement
Elliot Creager, David Madras, Joern-Henrik Jacobsen, Marissa Weis, Kevin Swersky, Toniann Pitassi, Richard Zemel
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High-Level Perceptual Similarity is Enabled by Learning Diverse Tasks
Amir Rosenfeld, Richard Zemel, John K. Tsotsos
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Incremental few-shot learning with attention attractor networks
Mengye Ren, Renjie Liao, Ethan Fetaya, Richard Zemel
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LanczosNet: Multi-scale deep graph convolutional networks
Renjie Liao, Zhizhen Zhao, Raquel Urtasun, Richard Zemel
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Lorentzian distance learning for hyperbolic representations
Marc Law, Renjie Liao, Jake Snell, Richard Zemel
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Understanding the origins of bias in word embedding
Marc-Etienne Brunet, Colleen Alkalay-Houlihan, Ashton Anderson, Richard Zemel
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2018
Adversarial distillation of Bayesian neural network posteriors
Kuan-Chieh Wang, Paul Vicol, James Lucas, Li Gu, Roger Grosse, Richard Zemel
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Graph Partition Neural Networks for Semi-Supervised Classification
Renjie Liao, Marc Brockschmidt, Daniel Tarlow, Alexander L. Gaunt, Raquel Urtasun, Richard Zemel
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Inference in Probabilistic Graphical Models by Graph Neural Networks
KiJung Yoon, Renjie Liao, Yuwen Xiong, Lisa Zhang, Ethan Fetaya, Raquel Urtasun, Richard Zemel, Xaq Pitkow
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Learning adversarially fair and transferable representations
David Madras, Elliot Creager, Toniann Pitassi, Richard Zemel
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Learning latent subspaces in variational autoencoders
Jack Klys, Jake Snell, Richard Zemel
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Meta-Learning for Semi-Supervised Few-Shot Classification
Mengye Ren, Eleni Triantafillou, Sachin Ravi, Jake Snell, Kevin Swersky, Joshua B. Tenenbaum, Hugo Larochelle, Richard S. Zemel
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Neural guided constraint logic programming for program synthesis
Lisa Zhang, Gregory Rosenblatt, Ethan Fetaya, Renjie Liao, William Byrd, Matthew Might, Raquel Urtasun, Richard Zemel.
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Neural relational inference for interacting systems
Thomas Kipf, Ethan Fetaya, Kuan-Chieh Wang, Max Welling, Richard Zemel
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Predict responsibly: improving fairness and accuracy by learning to defer
David Madras, Toni Pitassi, Richard Zemel
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Reviving and improving recurrent back-propagation
Renjie Liao, Yuwen Xiong, Ethan Fetaya, Lisa Zhang, KiJung Yoon, Zachary Pitkow, Raquel Urtasun, Richard Zemel
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The elephant in the room
Amir Rosenfeld, Richard Zemel, John K. Tsotsos
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2017
Causal effect inference with deep latent-variable models
Christos Louizos, Uri Shalit, Joris Mooij, David Sontag, Richard Zemel, Max Welling
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Deep spectral clustering learning
Marc Law, Raquel Urtasun, Richard Zemel
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Dualing GANs
Yujia Li, Alexander Schwing, Kuan-Chieh Wang, Richard Zemel
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Efficient multiple instance metric learning using weakly supervised data
Marc Law, Yaoling Yu, Raquel Urtasun, Richard Zemel, Eric Xing
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End-to-end instance segmentation with recurrent attention
Mengye Ren, Richard Zemel
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Few-shot learning through an information retrieval lens
Eleni Triantafillou, Richard Zemel, Raquel Urtasun
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Learning to generate images with perceptual similarity metrics
Jake Snell, Karl Ridgeway, Renjie Liao, Brett Roads, Michael Mozer & Richard Zemel
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Normalizing the normalizers: Comparing and extending network normalization schemes
Mengye Ren, Renjie Liao, Raquel Urtasun, Fabian Sinz, Richard Zemel
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Prototypical networks for few-shot learning
Jake Snell, Kevin Swersky, Richard Zemel
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Stochastic segmentation trees
Jake Snell, Richard Zemel
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2016
Classifying NBA offensive plays using neural networks
Kuan-Chieh Wang, Richard Zemel
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Gated graph sequence neural networks
Yujia Li, Daniel Tarlow, Marc Brockschmidt, Richard Zemel
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Learning deep parsimonious representations
Renjie Liao, Alexander Schwing, Richard Zemel, Raquel Urtasun
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The variational fair autoencoder
Christos Louizos, Kevin Swersky, Yujia Li, Max Welling, Richard Zemel
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Towards generalizable sentence embeddings
Eleni Triantafillou, Jamie Ryan Kiros, Raquel Urtasun, Richard Zemel
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Training deep neural networks via direct loss minimization
Yang Song, Alex Schwing, Richard Zemel, Raquel Urtasun
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Understanding the effective receptive field in deep convolutional neural networks
Wenjie Luo, Yujia Li, Raquel Urtasun, Richard Zemel
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2015
Aligning Books and Movies: Towards Story-like Visual Explanations by Watching Movies and Reading Books
Yukun Zhu, Ryan Kiros, Richard Zemel, Ruslan Salakhutdinov, Raquel Urtasun, Antonio Torralba, Sanja Fidler
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Exploring Models and Data for Image Question Answering
Mengye Ren, Ryan Kiros, Richard Zemel
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Generative Moment Matching Networks
Yujia Li, Kevin Swersky, Richard Zemel
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Show, Attend and Tell: Neural Image Caption Generation with Visual Attention
Kelvin Xu, Jimmy Ba, Ryan Kiros, Kyunghyun Cho, Aaron Courville, Ruslan Salakhutdinov, Richard Zemel, Yoshua Bengio
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Skip-Thought Vectors
Ryan Kiros, Yukun Zhu, Ruslan Salakhutdinov, Richard S. Zemel, Antonio Torralba, Raquel Urtasun, Sanja Fidler
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2014
A Multiplicative Model for Learning Distributed Text-Based Attribute Representations
Ryan Kiros, Richard S. Zemel, Ruslan Salakhutdinov
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Input Warping for Bayesian Optimization of Non-stationary Functions
Jasper Snoek, Kevin Swersky, Richard S. Zemel, Ryan P. Adams
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Learning unbiased features
Yujia Li, Kevin Swersky, Richard Zemel
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Mean-Field Networks
Yujia Li, Richard Zemel
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Unifying Visual-Semantic Embeddings with Multimodal Neural Language Models
Ryan Kiros, Ruslan Salakhutdinov, Richard S. Zemel
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2013
Learning Fair Representations
Richard Zemel, Yu Wu, Kevin Swersky, Toniann Pitassi, Cynthia Dwork
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2012
Active Learning for Matching Problems
Laurent Charlin, Richard Zemel, Craig Boutilier
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Fairness Through Awareness
Cynthia Dwork, Moritz Hardt, Toniann Pitassi, Omer Reingold, Richard Zemel
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Fast Exact Inference for Recursive Cardinality Models
Daniel Tarlow, Kevin Swersky, Richard S. Zemel, Ryan Prescott Adams, Brendan J. Frey
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2011
A Framework for Optimizing Paper Matching
Laurent Charlin, Richard S. Zemel, Craig Boutilier
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Interpreting Graph Cuts as a Max-Product Algorithm
Daniel Tarlow, Inmar E. Givoni, Richard S. Zemel, Brendan J. Frey
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Loss-sensitive Training of Probabilistic Conditional Random Fields
Maksims N. Volkovs, Hugo Larochelle, Richard S. Zemel
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Ranking via Sinkhorn Propagation
Ryan Prescott Adams, Richard S. Zemel
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2008
Flexible Priors for Exemplar-based Clustering
Daniel Tarlow, Richard S. Zemel, Brendan J. Frey
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2007
Collaborative Filtering and the Missing at Random Assumption
Benjamin Marlin, Richard S. Zemel, Sam Roweis, Malcolm Slaney
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2003
Active Collaborative Filtering
Craig Boutilier, Richard S. Zemel, Benjamin Marlin
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Efficient Parametric Projection Pursuit Density Estimation
Max Welling, Richard S. Zemel, Geoffrey E. Hinton
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