Set notation: Difference between revisions

Revision as of 09:59, 24 October 2014

Revision as of 17:49, 18 April 2015

Line 6:

:{{math|'''∅'''}} – [[empty set]] (also <math>\emptyset</math> or <math>\varnothing</math> or {{math|&#123;&#125;}} are common)

:{{math|'''CZ'''}} – [[complex numberinteger]]s (from ''Zahl'', German for ''[[integer]]'').

:{{math|'''N'''}} – [[natural number]]s

:{{math|'''Q'''}} – [[rational number]]s (from ''[[quotient]]'')

:{{math|'''R'''}} – [[real number]]s

:{{math|'''ZC'''}} – [[integercomplex number]]s (from ''Zahl'', German for ''[[integer]]'').

Some authors use the [[blackboard bold]] font for these particular sets (<math>\mathbb{C}</math>, <math>\mathbb{N}</math>, etc.). This usage is widely accepted in handwriting, but many mathematicians, and such experts on mathematical typography as [[Donald Knuth]], advise against its use in print.<ref>Krantz, S., ''Handbook of Typography for the Mathematical Sciences'', Chapman & Hall/CRC, Boca Raton, Florida, 2001, p. 35.</ref>