@article{107360, author = {Jean Mawhin}, title = {A simple proof of a semi-Fredholm principle for periodically forced systems with homogeneous nonlinearities}, journal = {Archivum Mathematicum}, volume = {025}, year = {1989}, pages = {235-238}, zbl = {0713.34045}, mrnumber = {1188067}, language = {en}, url = {http://dml.mathdoc.fr/item/107360} }
Mawhin, Jean. A simple proof of a semi-Fredholm principle for periodically forced systems with homogeneous nonlinearities. Archivum Mathematicum, Tome 025 (1989) pp. 235-238. http://gdmltest.u-ga.fr/item/107360/
A semi-Fredholm principle for periodically forced systems with homogeneous nonlinearities, Proc. Amer. Math. Soc., 106(1989), 119-125. (1989) | MR 0942635 | Zbl 0683.34027
Topological Degree Methods in Nonlinear Boundary Value Problems, CBMS Conference in Math. n°. 40, Americal Mathematical Soc., Providence, Rhode Island, 1979. (1979) | MR 0525202 | Zbl 0414.34025