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There is danger in reckless change; but greater danger in blind conservatism. Henry George		Thursday Oct 30, 2025
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If you disregard the very simplest cases, there is in all of mathematics not a single infinite series whose sum has been rigorously determined. In other words,the most important parts of mathematics stand without a foundation. Niels H. Abel

	Niels H. Abel
	(1802-1829) In G. F. Simmons, Calculus Gems, New York: Mcgraw Hill, Inc., 1992, p. 177 - Norwegian mathematician.