Ordinary differential equations
Equations relating a function of one variable to its derivatives.
Founded: 1687 — Newton's Principia
The claim
No credible dismissal found. Tied to mechanics and orbital motion from inception. Confidence on the absence of a dismissal is lower here than elsewhere on the Ledger.
What happened
Orbital mechanics (1687) — Newton derives Kepler's laws in the same work that founds the field.
0 years — applied from inception — no meaningful gap
Verdict: Never dismissed, applied anyway.
Confidence: low-medium.