Neural Collapse in Multi-label Learning with Pick-all-label Loss
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Abstract (arXiv)
We study deep neural networks for the multi-label classification (MLab) task through the lens of neural collapse (NC). Previous works have been restricted to the multi-class classification setting and discovered a prevalent NC phenomenon comprising of the following properties for the last-layer features: (i) the variability of features within every class collapses to zero, (ii) the set of feature means form an equi-angular tight frame (ETF), and (iii) the last layer classifiers collapse to the feature mean upon some scaling. We generalize the study to multi-label learning, and prove for the first time that a generalized NC phenomenon holds with the "pick-all-label" formulation, which we term as MLab NC. While the ETF geometry remains consistent for features with a single label, multi-label scenarios introduce a unique combinatorial aspect we term the "tag-wise average" property, where the means of features with multiple labels are the scaled averages of means for single-label instances. Theoretically, under proper assumptions on the features, we establish that the only global optimizer of the pick-all-label cross-entropy loss satisfy the multi-label NC. In practice, we demonstrate that our findings can lead to better test performance with more efficient training techniques for MLab learning.
Key facts. Cited by 14 papers in the map (data through 7 Oct 2026). Builds on 57 of its 89 references that are in the map. First posted on arXiv 24 Oct 2023.
Builds on
57 of 89 references.
References · 57
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- 2020General Multi-label Image Classification with Transformerscited by 126
- 2023Investigating the Catastrophic Forgetting in Multimodal Large Language Modelscited by 119
- 2019Learning with Fenchel-Young Lossescited by 117
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- 2021On the Role of Neural Collapse in Transfer Learningcited by 100
- 2022Inducing Neural Collapse in Imbalanced Learning: Do We Really Need a Learnable Classifier at the End of Deep Neural Network?cited by 100
- 2020The Emerging Trends of Multi-Label Learningcited by 99
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- 2023Generalizing and Decoupling Neural Collapse via Hyperspherical Uniformity Gapcited by 14
50 most cited of 57 All 57 (JSON)
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Citing papers per year: 2024: 5; 2025: 5; 2026: 4.
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- 2024Linguistic Collapse: Neural Collapse in (Large) Language Modelscited by 36
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- 2025Neural Collapse in Cumulative Link Models for Ordinal Regression: An Analysis with Unconstrained Feature Model6 Jun 2025
- 2025Neural Multivariate Regression: Qualitative Insights from the Unconstrained Feature Model14 May 2025
- 2024ℓ1-norm rank-one symmetric matrix factorization has no spurious second-order stationary points7 Oct 2024
- 2024Implicit Geometry of Next-token Prediction: From Language Sparsity Patterns to Model Representations27 Aug 2024
- 2024Compressible Dynamics in Deep Overparameterized Low-Rank Learning & Adaptation6 Jun 2024
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- 2024A Global Geometric Analysis of Maximal Coding Rate Reductioncited by 13
- 2025Neural Collapse in Cumulative Link Models for Ordinal Regression: An Analysis with Unconstrained Feature Modelcited by 6
- 2025Neural Multivariate Regression: Qualitative Insights from the Unconstrained Feature Modelcited by 2
- 2025Neural Collapse-Inspired Multi-Label Federated Learning under Label-Distribution Skewcited by 2
- 2025Diagonalizing the Softmax: Hadamard Initialization for Tractable Cross-Entropy Dynamicscited by 2
- 2025Geometric Analysis of Neural Regression Collapse via Intrinsic Dimensioncited by 1
- 2024ℓ1-norm rank-one symmetric matrix factorization has no spurious second-order stationary pointscited by 0
- 2026Bit-Identical Medical Deep Learning via Structured Orthogonal Initializationcited by 0
- 2026How Label Imbalance Shapes Geometry: A General Spectral Analysis of Multi-Label Neural Collapsecited by 0
12 most cited of 14 All 14 (JSON)
- 2026Understanding Head Geometry and Dynamics in Federated Regression through a Natural Solution Selection Rule: An Unconstrained Feature Model Analysis30 Sep 2026
- 2026The Implicit Bias of Depth: From Neural Collapse to Softmax Codes21 May 2026
- 2026How Label Imbalance Shapes Geometry: A General Spectral Analysis of Multi-Label Neural Collapse3 May 2026
- 2026Bit-Identical Medical Deep Learning via Structured Orthogonal Initialization30 Mar 2026
- 2025Diagonalizing the Softmax: Hadamard Initialization for Tractable Cross-Entropy Dynamics3 Dec 2025
- 2025Geometric Analysis of Neural Regression Collapse via Intrinsic Dimension1 Oct 2025
- 2025Neural Collapse-Inspired Multi-Label Federated Learning under Label-Distribution Skew16 Sep 2025
- 2025Neural Collapse in Cumulative Link Models for Ordinal Regression: An Analysis with Unconstrained Feature Model6 Jun 2025
- 2025Neural Multivariate Regression: Qualitative Insights from the Unconstrained Feature Model14 May 2025
- 2024ℓ1-norm rank-one symmetric matrix factorization has no spurious second-order stationary points7 Oct 2024
- 2024Implicit Geometry of Next-token Prediction: From Language Sparsity Patterns to Model Representations27 Aug 2024
- 2024Compressible Dynamics in Deep Overparameterized Low-Rank Learning & Adaptation6 Jun 2024
12 newest of 14 All 14 (JSON)