History
The concept of a closure is due to E. H. Moore, appearing in his 1910 Introduction to a form of general analysis, whereas that of a closure subset originated in the work of Frigyes Riesz in connection with topological spaces.
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“To summarize the contentions of this paper then. Firstly, the phrase ‘the meaning of a word’ is a spurious phrase. Secondly and consequently, a re-examination is needed of phrases like the two which I discuss, ‘being a part of the meaning of’ and ‘having the same meaning.’ On these matters, dogmatists require prodding: although history indeed suggests that it may sometimes be better to let sleeping dogmatists lie.”
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