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Duistermaat, J. J. Convexity and tightness for restrictions of Hamiltonian functions to fixed point sets of an antisymplectic involution. (English) Zbl 0504.58020 Trans. Am. Math. Soc. 275, 417-429 (1983). MSC: 37J99 53C55 57S25 37C80 53C15 53C42 55M20 57R70 PDFBibTeX XMLCite \textit{J. J. Duistermaat}, Trans. Am. Math. Soc. 275, 417--429 (1983; Zbl 0504.58020) Full Text: DOI