Bihari–LaSalle inequality
The Bihari–LaSalle inequality was proved by the American mathematician Joseph P. LaSalle (1916–1983) in 1949 and by the Hungarian mathematician Imre Bihari (1915–1998) in 1956. It is the following nonlinear generalization of Grönwall's lemma.
Source: Wikipedia — Bihari–LaSalle inequality (CC BY-SA 4.0)