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cs.LG2026
Form and Function: Machine Unlearning as a Problem of Misaligned States
Kennon Stewart
We formulate machine unlearning for online L-BFGS as a counterfactual state-alignment problem. Given an actual event stream and a deletion-edited counterfactual stream, the target…
cs.LG2026
Shape of Memory: a Geometric Analysis of Machine Unlearning in Second-Order Optimizers
Kennon Stewart
We argue that current definitions of machine unlearning are underspecified for second-order optimizers. We compare first-order and second-order learners for their ability to handle…