A Closed Separable Subspace of βN Which is Not a Retract
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1987 ◽
Vol 299
(2)
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pp. 641-641
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1982 ◽
Vol 32
(1)
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pp. 134-144
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2011 ◽
Vol 49
(1)
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pp. 67-70
1999 ◽
Vol 51
(1)
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pp. 26-48
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