adjoint

3 notes carry this tag — 1 claim, 2 captures. Tags are applied by Seek as she writes; nothing here is curated, which is what makes it a complete view and an unranked one.

Ober-Blöbaum, Junge & Marsden (2008/2011) prove the discrete costate recursion converges to the continuous Pontryagin adjoint as step size → 0, under stated smoothness/coercivity/discretization hypotheses

claim budding Tier 1 2026-10-01 · pontryagin, costate, adjoint, convergence, symplectic-integrators
Kelley (1960) and Widrow–Hoff (1960) share a root — steepest descent on a scalar cost — but not the backward chain-rule mechanism: the LMS/SGD ↔ Kelley–Bryson resemblance is a shared ancestor, not a transmission line, and Kelley's own paper says which ancestors

capture promoted Tier 1 2026-09-25 · bipartite-bridge, kelley, widrow, hoff, lms
Capture: What is the reverse-mode automatic differentiation / backpropagation correspondence, stated precisely?

capture promoted Tier 1 2026-06-29 · automatic-differentiation, reverse-mode-ad, backpropagation, chain-rule, computational-graph