Author

Chenhan Jin

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Preprint Aug 2026

Adaptive Bregman Proximal Stochastic Gradient with a Stabilized Barzilai--Borwein Step Size

Ada-BPSG is introduced, a line-search-free BPSG method that couples the SAGA gradient table with a stabilized Barzilai--Borwein (BB) candidate and yields a direct analytical chain from relative smoothness and component-wise variance control to convergence in finite-dimensional normed spaces.

Chenhan Jin, Shengze Xu, Binghui Xie et al. · 0 citations

Preprint Aug 2026

Toward Fine-Grained Forgetting:Attribute Unlearning for Multimodal Large Language Models

This work proposes Causal Localization and Retain-Aware Projection (CLRP), a lightweight training-free framework that uses activation patching to identify the layer that causally mediates target-attribute disclosure, then applies a retain-aware projection that removes the target-attribute subspace while preserving same-identity evidence.

Junkai Lin, Junkai Chen, Siqi Hou et al. · 0 citations