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Sourav Chakraborty

2 papers indexed

arxivcs.LGcs.AIcs.ITstat.ML2026-07-19

Kernelized Linear Attention: Breaking the Capacity Wall with Symmetric Cones

Ayoub Ghriss, Sourav Chakraborty

Linear attention promises constant-time recurrent inference but degrades sharply on associative recall. We formulate attention recall as a spherical-packing problem and introduce Kernelized Linear Attention Activations (KATA), a framework whose feature maps are derived from first…

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arxivcs.LGcs.AIstat.ML2026-07-12

Learning from Local Walks on Dynamic Graphs with Bandit Feedback

Sourav Chakraborty, Amit Kiran Rege, Claire Monteleoni, Lijun Chen

We study stochastic multi-armed bandits on dynamic graphs, where arms correspond to the vertices of a network with time-varying edges. In this setting, the learner is restricted to local movement, selecting only its current node or an immediate neighbor at each round. This constr…

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