Geodesic
Saddle points with respect to a~set
Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 2 (2011), pp. 70-80

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An extension of the concept of saddle point, a continuous property of two functions related to saddle points with respect to a set and a theorem of existence of saddle points with respect to a set are given. The paper ends with an example which shows that the proved theorems are consistent. 
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     author = {Dorel I. Duca and Liana Lup\c{s}a},
     title = {Saddle points with respect to a~set},
     journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica},
     pages = {70--80},
     publisher = {mathdoc},
     number = {2},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BASM_2011_2_a5/}
}
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Dorel I. Duca; Liana Lupşa. Saddle points with respect to a~set. Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 2 (2011), pp. 70-80. http://geodesic.mathdoc.fr/item/BASM_2011_2_a5/