Paul J. Cohen. The independence of the continuum hypothesis. Proceedings of the National Academy of Sciences of the United States of America, vol. 50 (1963), pp. 1143–1148, and vol. 51 (1964), pp. 105–110.
1973 ◽
Vol 70
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pp. 3009-3035
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2013 ◽
Vol 98
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pp. 3525-3528
1989 ◽
Vol 86
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pp. 9053-9074
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