Re: Two related question. Question 1

*To*: mathgroup at smc.vnet.net*Subject*: [mg57520] Re: Two related question. Question 1*From*: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>*Date*: Tue, 31 May 2005 04:59:17 -0400 (EDT)*Organization*: Uni Leipzig*References*: <d7dp2r$qam$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi, f = #1 + #2 &; c=f /. Function[body_] :> Function[(body)^2] ?? Regards Jens "Kazimir" <kazimir04 at yahoo.co.uk> schrieb im Newsbeitrag news:d7dp2r$qam$1 at smc.vnet.net... >I have two related question. Let me introduce a >pure function > > f = #1^2 + #2 & > > Now. I want to make an operation over the > function, for example to > find its square and to call the result (the > expected function f = (#1^2 > + #2)^2 & ) c: > > c=f^2 > > However, I do not obtain this, as > > c[a,b] > > does not evaluate to (a+b)^2. Can anybody advise > me how to obtain > such a function without long substitutions. I > would like to obtain > something which is made for derivatives : > > In[11]:= > Derivative[1][f] > > Out[11]= > 2 #1& > > In[12]:= > Derivative[2][f] > > Out[12]= > 2& > > Regards > > Vlad >