Thread function now working as expected

*To*: mathgroup at smc.vnet.net*Subject*: [mg74587] Thread function now working as expected*From*: siewsk at bp.com*Date*: Tue, 27 Mar 2007 04:03:04 -0500 (EST)

I cannot get the Thread function to work on In[3] and I am forced to do it manually in In[4] Does anyone has any idea why In[3] is not working as I expected? In[1]:= eqn1 = Sqrt[1 + 196*x^4] == 12*x - 1 - 14*x^2 Out[1]= 4 2 Sqrt[1 + 196 x ] == -1 + 12 x - 14 x In[2]:= eqn2 = Thread[(#1^2 & )[eqn1], Equal] Out[2]= 4 2 2 1 + 196 x == (-1 + 12 x - 14 x ) In[3]:= dummy = Thread[Expand[eqn2], Equal] Out[3]= 4 2 2 1 + 196 x == (-1 + 12 x - 14 x ) In[4]:= eqn3 = Equal[ eqn2[[1]] , Expand[ eqn2[[2]] ] ] Out[4]= 4 2 3 4 1 + 196 x == 1 - 24 x + 172 x - 336 x + 196 x In[5]:= Simplify[eqn3] Out[5]= 2 x (6 - 43 x + 84 x ) == 0

**Follow-Ups**:**Re: Thread function now working as expected***From:*"Chris Chiasson" <chris@chiasson.name>