Re: Simplify with NestedLessLess?

*To*: mathgroup at smc.vnet.net*Subject*: [mg106532] Re: Simplify with NestedLessLess?*From*: dh <dh at metrohm.com>*Date*: Fri, 15 Jan 2010 03:21:21 -0500 (EST)*References*: <himsqd$jd0$1@smc.vnet.net> <4B4F126E.4010304@metrohm.com> <4B4FAB01.1080604@ieee.org>

Hi Dave, the simplest you can do is to use a user defined function. If you want to define a infix operator, look at the docu of the Notation package, but this is not a topic I would tackle as a beginner. Daniel Dave Bird wrote: > Thanks Daniel for the info. > > How does one "design a new operator" which Simplify could use as an > assumption. I'm a Mathematica newby, so please excuse my ignorance. > > Thanks again, > > Dave > > dh wrote: >> Hi Dave, >> << does not have a meaning in mathematica. It is only a symbol. >> Therefore your expression is not simplified. >> You may define a new operator for your purposes. >> Daniel >> >> dbird wrote: >>> Please excuse if this has been answered before, but I can't find it. >>> >>> Is there some way to do a Simplify with assumptions using a >>> NestedLessLess or something similar? For example: >>> >>> d=a+b >>> Simplify[d,NestedLessLess[a,b]] >>> >>> Answer is: >>> a+b >>> >>> Answer should be: >>> b >>> >>> Thanks, >>> >>> Dave >>> >> >> >> > > > -- Daniel Huber Metrohm Ltd. Oberdorfstr. 68 CH-9100 Herisau Tel. +41 71 353 8585, Fax +41 71 353 8907 E-Mail:<mailto:dh at metrohm.com> Internet:<http://www.metrohm.com>