Abstract: | Summary The sufficient conditions for the existence and uniqueness of solution u(t) of the differential equation u″=f(t, u, u′), are
established, satisfying the condition
u(t)= =u0, u(t)≥0 and u′(t)≥0 for t ε (0,+∞).
Entrata in Redazione il 26 aprile 1968. |