Re: simplifying algebraic expressions with Null

*To*: mathgroup at smc.vnet.net*Subject*: [mg125136] Re: simplifying algebraic expressions with Null*From*: Ramiro Magno <ramiro.magno at gmail.com>*Date*: Thu, 23 Feb 2012 05:48:49 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <7BB0E96E72E84E41B24A1FF8ED13F5E6299735C55D@IE2RD2XVS581.red002.local>

Thanks Alexei for your answer. But actually I need a replacement rule (SpecialRule) that works on any algebraic expression, i.e. involving either/and addition, subtraction, multiplication, division or raising to a power, etc.., in other words, on any expression that would yield a scalar number (in my case assuming a Real number) would suffice. Ex: x=Exp[Null] y=x/./.SpecialRule Null