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This number is not cited often in the literature. A google scholar search for it yields only 5 unique results. One of these citations includes "The Ruark number, equal to the reciprocal of the Euler number...". I suggest this article be deleted, and a mention be made of this number in the Euler number page. Rememberlands ( talk) 04:09, 7 June 2013 (UTC) reply

This article will redirect to Euler number. Rememberlands ( talk) 04:32, 7 June 2013 (UTC) reply