nonlinear differential equations;
Peano's existence theorem;
regularity;
diffeomorphism;
local invertibility;
Wazewski's theorem;
Hadamard-Levy-Plastock condition;
D O I:
暂无
中图分类号:
O29 [应用数学];
学科分类号:
070104 ;
摘要:
Using a novel Wintner-type formulation of the classical Peano's existence theorem [Math. Ann. 37 (1890), 182-228], we enhance Wazewski's result on invertibility of maps defined on closed balls [Ann. Soc. Pol. Math. 20 ( 1947), 81-125] securing the size of the domain of invertibility that agrees with the bounds derived by John [Comm. Pure Appl. Math. 21 ( 1968), 77-110] and Sotomayor [Z. Angew. Math. Phys. 41 (1990), 306-310].