What is "Divide by zero"?

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Author Message   shi liang (caleb_shi) New member Username: caleb_shi Post Number: 1 Registered: 12-2004 Posted on Thursday, December 30, 2004 - 11:29 am:    hello, when i solve "div(grad(sqrt(V)))+V*sqrt(V)=V", to get value of V, but i got the problem of "Divide by Zero". however, i dont know what is that and how to solve it. so can anyone give me help. Thanks a lot!   Patricio A. Greco (pagreco) New member Username: pagreco Post Number: 1 Registered: 12-2004 Posted on Friday, December 31, 2004 - 10:54 am:    Your problem have a very basic answer: Let y=F(x) Dx(Sqrt(y))=0.5*1/Sqrt(y) are defined if y are diferent of 0   Robert G. Nelson (rgnelson) Moderator Username: rgnelson Post Number: 293 Registered: 06-2003 Posted on Friday, December 31, 2004 - 11:38 pm:    Try solving for a different variable w = sqrt(v) Then the equation becomes div(grad(w))+w^2*(w-1)=0 Provided that the solution is everywhere >0, you can compute v=w^2.