The HSIC Bottleneck: Deep Learning without Back-Propagation
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Abstract (arXiv)
We introduce the HSIC (Hilbert-Schmidt independence criterion) bottleneck for training deep neural networks. The HSIC bottleneck is an alternative to the conventional cross-entropy loss and backpropagation that has a number of distinct advantages. It mitigates exploding and vanishing gradients, resulting in the ability to learn very deep networks without skip connections. There is no requirement for symmetric feedback or update locking. We find that the HSIC bottleneck provides performance on MNIST/FashionMNIST/CIFAR10 classification comparable to backpropagation with a cross-entropy target, even when the system is not encouraged to make the output resemble the classification labels. Appending a single layer trained with SGD (without backpropagation) to reformat the information further improves performance.
Key facts. Cited by 77 papers in the map (data through 7 Oct 2026). First posted on arXiv 5 Aug 2019.
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Citing papers per year: 2020: 1; 2021: 13; 2022: 8; 2023: 17; 2024: 17; 2025: 12; 2026: 9.
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- 2021Self-Supervised Learning with Kernel Dependence Maximizationcited by 77
- 2025Demystifying Reasoning Dynamics with Mutual Information: Thinking Tokens are Information Peaks in LLM Reasoningcited by 50
- 2024Do Vision and Language Encoders Represent the World Similarly?cited by 44
- 2020Towards Crowdsourced Training of Large Neural Networks using Decentralized Mixture-of-Expertscited by 43
- 2021Independent Prototype Propagation for Zero-Shot Compositionalitycited by 42
- 2021Causal Effect Inference for Structured Treatmentscited by 38
- 2021Semi-supervised Meta-learning with Disentanglement for Domain-generalised Medical Image Segmentationcited by 36
- 2023Quality-Agnostic Deepfake Detection with Intra-model Collaborative Learningcited by 32
- 2023FwdLLM: Efficient FedLLM using Forward Gradientcited by 25
- 2021Revisiting Hilbert-Schmidt Information Bottleneck for Adversarial Robustnesscited by 20
- 2024Towards Tracing Trustworthiness Dynamics: Revisiting Pre-training Period of Large Language Modelscited by 18
- 2021An Information Theory-inspired Strategy for Automatic Network Pruningcited by 17
38 more
- 2023Orthogonal Annotation Benefits Barely-supervised Medical Image Segmentationcited by 15
- 2023DualHSIC: HSIC-Bottleneck and Alignment for Continual Learningcited by 15
- 2022Pruning Adversarially Robust Neural Networks without Adversarial Examplescited by 12
- 2023MIMIR: Masked Image Modeling for Mutual Information-based Adversarial Robustnesscited by 12
- 2023One Forward is Enough for Neural Network Training via Likelihood Ratio Methodcited by 11
- 2024Harnessing Frozen Unimodal Encoders for Flexible Multimodal Alignmentcited by 11
- 2024Towards Continual Learning Desiderata via HSIC-Bottleneck Orthogonalization and Equiangular Embeddingcited by 9
- 2024Cauchy-Schwarz Divergence Information Bottleneck for Regressioncited by 9
- 2023Spiking Neural Networks and Bio-Inspired Supervised Deep Learning: A Surveycited by 8
- 2024End-to-End Training Induces Information Bottleneck through Layer-Role Differentiation: A Comparative Analysis with Layer-wise Trainingcited by 8
- 2024LIX: Implicitly Infusing Spatial Geometric Prior Knowledge into Visual Semantic Segmentation for Autonomous Drivingcited by 8
- 2021Data Augmentation for Graph Convolutional Network on Semi-Supervised Classificationcited by 7
- 2026ActQuant: Sub-4-bit Action-Guided Quantization for Vision-Language-Action Modelscited by 7
- 2024FFCL: Forward-Forward Net with Cortical Loops, Training and Inference on Edge Without Backpropagationcited by 6
- 2021Training Deep Architectures Without End-to-End Backpropagation: A Survey on the Provably Optimal Methodscited by 5
- 2021Expert System Gradient Descent Style Training: Development of a Defensible Artificial Intelligence Techniquecited by 5
- 2024The Tug of War Within: Mitigating the Fairness-Privacy Conflicts in Large Language Modelscited by 5
- 2025Multi-Value Alignment for LLMs via Value Decorrelation and Extrapolationcited by 5
- 2023Diversity-enhancing Generative Network for Few-shot Hypothesis Adaptationcited by 4
- 2023Module-wise Training of Neural Networks via the Minimizing Movement Schemecited by 4
- 2025Explaining Grokking and Information Bottleneck through Neural Collapse Emergencecited by 4
- 2023Text Representation Distillation via Information Bottleneck Principlecited by 3
- 2024FLOPS: Forward Learning with OPtimal Samplingcited by 3
- 2022Deep Layer-wise Networks Have Closed-Form Weightscited by 2
- 2022A Robust Backpropagation-Free Framework for Imagescited by 2
- 2023IB-RAR: Information Bottleneck as Regularizer for Adversarial Robustnesscited by 2
- 2023Duality Principle and Biologically Plausible Learning: Connecting the Representer Theorem and Hebbian Learningcited by 2
- 2024Exploring Heterogeneity and Uncertainty for Graph-based Cognitive Diagnosis Models in Intelligent Educationcited by 2
- 2025H-SPLID: HSIC-based Saliency Preserving Latent Information Decompositioncited by 2
- 2026Step-CoT: Stepwise Visual Chain-of-Thought for Medical Visual Question Answeringcited by 2
- 2021Intra-Model Collaborative Learning of Neural Networkscited by 1
- 2021Information Bottleneck-Based Hebbian Learning Rule Naturally Ties Working Memory and Synaptic Updatescited by 1
- 2022Deep Regression Ensemblescited by 1
- 2022HSIC-InfoGAN: Learning Unsupervised Disentangled Representations by Maximising Approximated Mutual Informationcited by 1
- 2022Measuring Statistical Dependencies via Maximum Norm and Characteristic Functionscited by 1
- 2022Block-wise Training of Residual Networks via the Minimizing Movement Schemecited by 1
- 2023Gate Recurrent Unit Network based on Hilbert-Schmidt Independence Criterion for State-of-Health Estimationcited by 1
- 2023SLM: End-to-end Feature Selection via Sparse Learnable Maskscited by 1
50 most cited of 77 All 77 (JSON)
- 2026The Price of Locality: Why Forward-Forward Underperforms Backpropagation?27 Sep 2026
- 2026A Joint-Distribution Route to Fair Representations with Continuous Sensitive Attributes11 Aug 2026
- 2026LOKI: Memory-Free Null-Space Constrained Lifelong Knowledge Editing18 Jun 2026
- 2026ActQuant: Sub-4-bit Action-Guided Quantization for Vision-Language-Action Models19 May 2026
- 2026Modular Representation Compression: Adapting LLMs for Efficient and Effective Recommendations20 Apr 2026
- 2026CausalDisenSeg: A Causality-Guided Disentanglement Framework with Counterfactual Reasoning for Robust Brain Tumor Segmentation Under Missing Modalities15 Apr 2026
- 2026Dual Stream Independence Decoupling for True Emotion Recognition under Masked Expressions17 Mar 2026
- 2026Step-CoT: Stepwise Visual Chain-of-Thought for Medical Visual Question Answering14 Mar 2026
- 2026MIRRORTALK: Forging Personalized Avatars Via Disentangled Style and Hierarchical Motion Control30 Jan 2026
- 2025NetworkFF: Unified Layer Optimization in Forward-Only Neural Networks19 Dec 2025
- 2025LightHCG: a Lightweight yet powerful HSIC Disentanglement based Causal Glaucoma Detection Model framework2 Dec 2025
- 2025Multi-Value Alignment for LLMs via Value Decorrelation and Extrapolation15 Nov 2025
38 more
- 2025Information-Theoretic Greedy Layer-wise Training for Traffic Sign Recognition31 Oct 2025
- 2025H-SPLID: HSIC-based Saliency Preserving Latent Information Decomposition23 Oct 2025
- 2025Provable Speech Attributes Conversion via Latent Independence6 Oct 2025
- 2025Learning without Global Backpropagation via Synergistic Information Distillation27 Sep 2025
- 2025Explaining Grokking and Information Bottleneck through Neural Collapse Emergence25 Sep 2025
- 2025Forward-Only Continual Learning1 Sep 2025
- 2025Linear cost mutual information estimation and independence test of similar performance as HSIC25 Aug 2025
- 2025Demystifying Reasoning Dynamics with Mutual Information: Thinking Tokens are Information Peaks in LLM Reasoning3 Jun 2025
- 2025Enhanced Structured Lasso Pruning with Class-wise Information13 Feb 2025
- 2024Training neural networks without backpropagation using particles7 Dec 2024
- 2024Disentangling Interpretable Factors with Supervised Independent Subspace Principal Component Analysis31 Oct 2024
- 2024The Tug of War Within: Mitigating the Fairness-Privacy Conflicts in Large Language Models22 Oct 2024
- 2024FLOPS: Forward Learning with OPtimal Sampling8 Oct 2024
- 2024Harnessing Frozen Unimodal Encoders for Flexible Multimodal Alignment28 Sep 2024
- 2024FFCL: Forward-Forward Net with Cortical Loops, Training and Inference on Edge Without Backpropagation21 May 2024
- 2024Biology-inspired joint distribution neurons based on Hierarchical Correlation Reconstruction allowing for multidirectional propagation of values and densities8 May 2024
- 2024Cauchy-Schwarz Divergence Information Bottleneck for Regression27 Apr 2024
- 2024Approximated Likelihood Ratio: A Forward-Only and Parallel Framework for Boosting Neural Network Training18 Mar 2024
- 2024LIX: Implicitly Infusing Spatial Geometric Prior Knowledge into Visual Semantic Segmentation for Autonomous Driving13 Mar 2024
- 2024Towards Independence Criterion in Machine Unlearning of Features and Labels12 Mar 2024
- 2024Bipartite Graph Variational Auto-Encoder with Fair Latent Representation to Account for Sampling Bias in Ecological Networks4 Mar 2024
- 2024Towards Tracing Trustworthiness Dynamics: Revisiting Pre-training Period of Large Language Models29 Feb 2024
- 2024Exploring Heterogeneity and Uncertainty for Graph-based Cognitive Diagnosis Models in Intelligent Education15 Feb 2024
- 2024End-to-End Training Induces Information Bottleneck through Layer-Role Differentiation: A Comparative Analysis with Layer-wise Training14 Feb 2024
- 2024Towards Continual Learning Desiderata via HSIC-Bottleneck Orthogonalization and Equiangular Embedding17 Jan 2024
- 2024Do Vision and Language Encoders Represent the World Similarly?10 Jan 2024
- 2023Go beyond End-to-End Training: Boosting Greedy Local Learning with Context Supply12 Dec 2023
- 2023MIMIR: Masked Image Modeling for Mutual Information-based Adversarial Robustness8 Dec 2023
- 2023Text Representation Distillation via Information Bottleneck Principle9 Nov 2023
- 2023Module-wise Training of Neural Networks via the Minimizing Movement Scheme29 Sep 2023
- 2023Quality-Agnostic Deepfake Detection with Intra-model Collaborative Learning12 Sep 2023
- 2023FwdLLM: Efficient FedLLM using Forward Gradient26 Aug 2023
- 2023MOLE: MOdular Learning FramEwork via Mutual Information Maximization15 Aug 2023
- 2023Duality Principle and Biologically Plausible Learning: Connecting the Representer Theorem and Hebbian Learning2 Aug 2023
- 2023Unlocking the Potential of Similarity Matching: Scalability, Supervision and Pre-training2 Aug 2023
- 2023Spiking Neural Networks and Bio-Inspired Supervised Deep Learning: A Survey30 Jul 2023
- 2023Diversity-enhancing Generative Network for Few-shot Hypothesis Adaptation12 Jul 2023
- 2023One Forward is Enough for Neural Network Training via Likelihood Ratio Method15 May 2023
50 newest of 77 All 77 (JSON)
- 2021Self-Supervised Learning with Kernel Dependence Maximizationcited by 77
- 2024Do Vision and Language Encoders Represent the World Similarly?cited by 44
- 2021Independent Prototype Propagation for Zero-Shot Compositionalitycited by 42
- 2021Causal Effect Inference for Structured Treatmentscited by 38
- 2021Semi-supervised Meta-learning with Disentanglement for Domain-generalised Medical Image Segmentationcited by 36
- 2023Quality-Agnostic Deepfake Detection with Intra-model Collaborative Learningcited by 32
- 2023FwdLLM: Efficient FedLLM using Forward Gradientcited by 25
- 2021Revisiting Hilbert-Schmidt Information Bottleneck for Adversarial Robustnesscited by 20
- 2024Towards Tracing Trustworthiness Dynamics: Revisiting Pre-training Period of Large Language Modelscited by 18
- 2021An Information Theory-inspired Strategy for Automatic Network Pruningcited by 17
- 2023Orthogonal Annotation Benefits Barely-supervised Medical Image Segmentationcited by 15
- 2023DualHSIC: HSIC-Bottleneck and Alignment for Continual Learningcited by 15
12 most cited of 69 All 69 (JSON)
- 2026The Price of Locality: Why Forward-Forward Underperforms Backpropagation?27 Sep 2026
- 2026A Joint-Distribution Route to Fair Representations with Continuous Sensitive Attributes11 Aug 2026
- 2026LOKI: Memory-Free Null-Space Constrained Lifelong Knowledge Editing18 Jun 2026
- 2026Modular Representation Compression: Adapting LLMs for Efficient and Effective Recommendations20 Apr 2026
- 2026CausalDisenSeg: A Causality-Guided Disentanglement Framework with Counterfactual Reasoning for Robust Brain Tumor Segmentation Under Missing Modalities15 Apr 2026
- 2026Dual Stream Independence Decoupling for True Emotion Recognition under Masked Expressions17 Mar 2026
- 2026MIRRORTALK: Forging Personalized Avatars Via Disentangled Style and Hierarchical Motion Control30 Jan 2026
- 2025NetworkFF: Unified Layer Optimization in Forward-Only Neural Networks19 Dec 2025
- 2025LightHCG: a Lightweight yet powerful HSIC Disentanglement based Causal Glaucoma Detection Model framework2 Dec 2025
- 2025Information-Theoretic Greedy Layer-wise Training for Traffic Sign Recognition31 Oct 2025
- 2025H-SPLID: HSIC-based Saliency Preserving Latent Information Decomposition23 Oct 2025
- 2025Provable Speech Attributes Conversion via Latent Independence6 Oct 2025
12 newest of 69 All 69 (JSON)