Sets of visibility
Portugaliae mathematica, Tome 11 (1952) no. 3, pp. 137-140.

Voir la notice de l'article provenant de la source European Digital Mathematics Library

Keywords: set theory
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     author = {Bourgin, D.G.},
     title = {Sets of visibility},
     journal = {Portugaliae mathematica},
     pages = {137--140},
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     number = {3},
     year = {1952},
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     zbl = {0047.28901},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1952__11_3_114707/}
}
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Bourgin, D.G. Sets of visibility. Portugaliae mathematica, Tome 11 (1952) no. 3, pp. 137-140. http://geodesic.mathdoc.fr/item/PORMA_1952__11_3_114707/