Finding Solutions for ODE y'=2*sqrt(|y|) with Initial Condition y(0)=0

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SUMMARY

The ordinary differential equation (ODE) y' = 2*sqrt(|y|) with the initial condition y(0) = 0 has two distinct solutions around the point (0,0). The first solution is obtained through integration, yielding y(x) = (1/4)x^2, while the second solution is the trivial solution y(x) = 0. The existence and uniqueness theorem confirms that multiple solutions can exist when the function is not Lipschitz continuous at the initial condition, which applies in this case due to the square root term.

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Homework Statement


Given this ODE :
y'=2*sqrt(|y|) , y(0)=0 ...
Can we find two different soloutions around (0,0) ? If there are, find them... If there are no two different soloutions around (0,0) - explain why...

Help is needed! TNX


Homework Equations


The Attempt at a Solution

 
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y'= dy/dx= 2\sqrt{y}= 2y^{1/2}
so
y^{-1/2}dy= 2dx
Integrate to get one solution. Another obvious solution is y(x)= 0.
 
Hey there hallsofIvy...I did it this way too, but I really thought that we must have a contradiction or something from the existence and uniqueess theorem...NVM...

TNX a lot for your help!
 

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