Search Results for author: Grigorios G Chrysos

Found 12 papers, 3 papers with code

Robust NAS under adversarial training: benchmark, theory, and beyond

no code implementations19 Mar 2024 Yongtao Wu, Fanghui Liu, Carl-Johann Simon-Gabriel, Grigorios G Chrysos, Volkan Cevher

Recent developments in neural architecture search (NAS) emphasize the significance of considering robust architectures against malicious data.

Learning Theory Neural Architecture Search

Benign Overfitting in Deep Neural Networks under Lazy Training

no code implementations30 May 2023 Zhenyu Zhu, Fanghui Liu, Grigorios G Chrysos, Francesco Locatello, Volkan Cevher

This paper focuses on over-parameterized deep neural networks (DNNs) with ReLU activation functions and proves that when the data distribution is well-separated, DNNs can achieve Bayes-optimal test error for classification while obtaining (nearly) zero-training error under the lazy training regime.

Learning Theory

Regularization of polynomial networks for image recognition

no code implementations CVPR 2023 Grigorios G Chrysos, Bohan Wang, Jiankang Deng, Volkan Cevher

We introduce a class of PNs, which are able to reach the performance of ResNet across a range of six benchmarks.

Extrapolation and Spectral Bias of Neural Nets with Hadamard Product: a Polynomial Net Study

no code implementations16 Sep 2022 Yongtao Wu, Zhenyu Zhu, Fanghui Liu, Grigorios G Chrysos, Volkan Cevher

Neural tangent kernel (NTK) is a powerful tool to analyze training dynamics of neural networks and their generalization bounds.

Generalization Bounds

Robustness in deep learning: The good (width), the bad (depth), and the ugly (initialization)

no code implementations15 Sep 2022 Zhenyu Zhu, Fanghui Liu, Grigorios G Chrysos, Volkan Cevher

In particular, when initialized with LeCun initialization, depth helps robustness with the lazy training regime.

Generalization Properties of NAS under Activation and Skip Connection Search

no code implementations15 Sep 2022 Zhenyu Zhu, Fanghui Liu, Grigorios G Chrysos, Volkan Cevher

To this end, we derive the lower (and upper) bounds of the minimum eigenvalue of the Neural Tangent Kernel (NTK) under the (in)finite-width regime using a certain search space including mixed activation functions, fully connected, and residual neural networks.

Learning Theory Neural Architecture Search

Sound and Complete Verification of Polynomial Networks

1 code implementation15 Sep 2022 Elias Abad Rocamora, Mehmet Fatih Sahin, Fanghui Liu, Grigorios G Chrysos, Volkan Cevher

Polynomial Networks (PNs) have demonstrated promising performance on face and image recognition recently.

Adversarial Audio Synthesis with Complex-valued Polynomial Networks

no code implementations14 Jun 2022 Yongtao Wu, Grigorios G Chrysos, Volkan Cevher

Our models can encourage the systematic design of other efficient architectures on the complex field.

Audio Generation Audio Synthesis

Controlling the Complexity and Lipschitz Constant improves polynomial nets

no code implementations ICLR 2022 Zhenyu Zhu, Fabian Latorre, Grigorios G Chrysos, Volkan Cevher

While the class of Polynomial Nets demonstrates comparable performance to neural networks (NN), it currently has neither theoretical generalization characterization nor robustness guarantees.

Cluster-guided Image Synthesis with Unconditional Models

no code implementations CVPR 2022 Markos Georgopoulos, James Oldfield, Grigorios G Chrysos, Yannis Panagakis

The results highlight the ability of our approach to condition image generation on attributes like gender, pose and hair style on faces, as well as a variety of features on different object classes.

Image Generation

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