# Ostrogradsky instability

> phenomenon that Lagrangians with higher-than-second-order derivatives produce Hamiltonians unbounded frorm below

**Wikidata**: [Q25303727](https://www.wikidata.org/wiki/Q25303727)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Ostrogradsky_instability)  
**Source**: https://4ort.xyz/entity/ostrogradsky-instability