Thematic
Cantor’s theorem
Cantor’s theorem states that the cardinal number (‘size’) of the set of subsets of any set is greater than the cardinal number of the set itself. So once ...
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Thematic
Continuum hypothesis
The ‘continuum hypothesis’ (CH) asserts that there is no set intermediate in cardinality (‘size’) between the set of real numbers (the ‘continuum’) and the set of natural numbers. ...
Biographical
Bachelard, Gaston (1884–1962)
One indication of the originality of Bachelard’s work is that he was famous for his writings both in the philosophy of science and on the poetic imagination. His ...