
Differential Equations Ordinary and Partial Differential Equations Math Forum 
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January 30th, 2012, 03:59 AM  #11  
Newbie Joined: Jan 2012 Posts: 6 Thanks: 0  Re: Quote:
But why would the last term be left out i.e why and NOT I would have thought that adding the last term allows for x to explicitly vary with time t.  
January 30th, 2012, 02:55 PM  #12 
Global Moderator Joined: Dec 2006 Posts: 20,919 Thanks: 2202 
I originally gave "x is a function of y and z". Perhaps I should have given "x is a function of y and z only" so as to make it clearer that x is not explicitly a function of t as well as y and z.


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