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On the existence and formulation of variational principles for systems of scalar partial differential equations

✍ Scribed by O.P. Bhutani; Santosh Sharma


Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
756 KB
Volume
17
Category
Article
ISSN
0020-7225

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## Abstract In this paper, we establish several criteria for the existence, multiplicity, nonexistence of positive periodic solutions of the following system by combining some new properties of Green's function together with Krasnosel'skΔ­ fixed point theorem on the compression and expression of co