Re: Simplify

*To*: mathgroup at smc.vnet.net*Subject*: [mg98672] Re: Simplify*From*: Raffy <raffy at mac.com>*Date*: Thu, 16 Apr 2009 04:12:28 -0400 (EDT)*References*: <gs47pv$7tv$1@smc.vnet.net>

On Apr 15, 2:01 am, dh <d... at metrohm.com> wrote: > Hi, > > can somebody explain, why > > Simplify[x^2/y^2,ComplexityFunction->LeafCount] > > does not simplify to (x/y)^2, although the LeafCount is: > > LeafCount[Hold[x^2/y^2]] gives 10 > > and > > LeafCount[Hold[(x/y)^2]] gives 8 > > Daniel Hold[x^2/y^2] // FullForm ==> Hold[Times[Power[x,2],Power[Power[y, 2],-1]]] x^2/y^2 // FullForm ==> Times[Power[x,2],Power[y,-2]] x^2/y^2 // LeafCount ==> 7