Definition. checkpoint-trajectory extrapolation [chen2026lowrank, Sections 4 and 5.1] [ftip-0069]
Definition. checkpoint-trajectory extrapolation [chen2026lowrank, Sections 4 and 5.1] [ftip-0069]
NExt forms global and local parameter differences from saved low-rank adaptation (LoRA) checkpoints, approximates each matrix difference by leading singular factors, and trains a predictor on those representations to estimate a future difference. It adds a scaled predicted difference to a checkpoint; the reported experiments then resume RLVR updates.
The construction replaces some realized rollout-and-update steps with a learned parameter jump. It does not introduce a new verifier signal.