Greater implies unequal?

*To*: mathgroup at smc.vnet.net*Subject*: [mg75236] Greater implies unequal?*From*: anguzman at ing.uchile.cl*Date*: Sat, 21 Apr 2007 23:12:18 -0400 (EDT)

Hello: I'm using Mathematica v5. Why do I get?: Clear[a]; Remove[a] In[43]:= Simplify[Sqrt[a]!=0,a>0] Out[43]= Sqrt[a] != 0 In[46]:= Simplify[Sqrt[2]!=0,a>0] Out[46]= True In[47]:= 2!=3 Out[47]= True In[48]:= Simplify[Sqrt[2 a]!=0,a>0] Out[48]= Sqrt[a] != 0 Does anyone else get this? The main problem is In[43] and Out[43]. I checked that "a" does not have a pre-defined value, or Sqrt. I also get : In[50]:= Simplify[Sqrt[a]>0,a>0 ] Out[50]= True In[51]:= Simplify[Sqrt[a]<0,a>0 ] Out[51]= False Well, I think it makes more sense that Out[50]or Out[51] were undefined... Atte. Andres Guzman ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.