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Here is an example of negative lookahead assertion in regular expression using Python: import re strings = ['foo', 'bar', 'baz', 'foo-bar', 'bar-baz', 'baz-foo'] matches = [s for s in strings if re.search('^(?!.*foo)', s)] print(matches) The regular expression ^(?!.*foo) in the above example matches strings that do not contain the pattern...

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Introduction In mathematics, a function \( f \) from a set \( X \) to a set \( Y \) is a relation that associates each element of \( X \) with exactly one element of \( Y. \) This page describes the commonly used notation, terminology, and concepts pertaining to functions. Contents Introduction Definition Notation Domain,...

Real Analysis Meeting time: 19:00 UTC on Saturdays and Sundays usually.† Meeting duration: 40 minutes. Meeting link: susam.net/meet Meeting log: click here Reference book: Real Analysis by John M. Howie (2001) Chapter notes: ch01.html Club channel: ...