How to get sqrt(Year^2)===Year?

*To*: mathgroup at smc.vnet.net*Subject*: [mg75724] How to get sqrt(Year^2)===Year?*From*: Hatto von Aquitanien <abbot at AugiaDives.hre>*Date*: Wed, 9 May 2007 04:33:05 -0400 (EDT)

If I have some expression which takes the square root of a square, it evaluates leaving the whole square root expression unchanged. Year == (Year^2)^(1/2) just returns what I entered when evaluated. Year == Year evaluates to True. How do I persuade Mathematica to evaluate the first expression completely? -- http://www.dailymotion.com/video/x1ek5w_wtc7-the-smoking-gun-of-911-updated http://911research.wtc7.net http://vehme.blogspot.com Virtus Tutissima Cassis

**Follow-Ups**:**Re: How to get sqrt(Year^2)===Year?***From:*Sseziwa Mukasa <mukasa@jeol.com>