On $f$-best approximation in topological spaces
Archivum mathematicum, Tome 21 (1985) no. 4, pp. 229-233.

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Classification : 41A50, 41A65
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     author = {Narang, T. D.},
     title = {On $f$-best approximation in topological spaces},
     journal = {Archivum mathematicum},
     pages = {229--233},
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     number = {4},
     year = {1985},
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     zbl = {0585.41029},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1985__21_4_a6/}
}
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Narang, T. D. On $f$-best approximation in topological spaces. Archivum mathematicum, Tome 21 (1985) no. 4, pp. 229-233. http://geodesic.mathdoc.fr/item/ARM_1985__21_4_a6/