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Corrected the definition of discrete collection. Hombre1729 (talk) 21:02, 5 February 2010 (UTC)
Changed one instance of "metrisation" to "metrization". Hombre1729 (talk) 21:06, 5 February 2010 (UTC)
if you assume T3 (regularity) you don't need to assume T0 because T3 implies T0 Sanguin13 (talk) 16:17, 23 March 2013 (UTC)