Geodesic
A simple proof of a semi-Fredholm principle for periodically forced systems with homogeneous nonlinearities
Archivum mathematicum, Tome 25 (1989) no. 4, pp. 235-238 Cet article a éte moissonné depuis la source Czech Digital Mathematics Library

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Classification : 34C25 
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     author = {Mawhin, Jean},
     title = {A simple proof of a {semi-Fredholm} principle for periodically forced systems with homogeneous nonlinearities},
     journal = {Archivum mathematicum},
     pages = {235--238},
     year = {1989},
     volume = {25},
     number = {4},
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     zbl = {0713.34045},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1989_25_4_a5/}
}
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Mawhin, Jean. A simple proof of a semi-Fredholm principle for periodically forced systems with homogeneous nonlinearities. Archivum mathematicum, Tome 25 (1989) no. 4, pp. 235-238. http://geodesic.mathdoc.fr/item/ARM_1989_25_4_a5/

[1] A. C. Lazer, P. J. McKenna: A semi-Fredholm principle for periodically forced systems with homogeneous nonlinearities. Proc. Amer. Math. Soc., 106(1989), 119-125. | MR | Zbl

[2] J. Mawhin: Topological Degree Methods in Nonlinear Boundary Value Problems. CBMS Conference in Math. n°. 40, Americal Mathematical Soc., Providence, Rhode Island, 1979. | MR | Zbl