What is the interval of definition for solutions of differential equations?

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The interval of definition for solutions of differential equations is the largest interval where the solution is sufficiently differentiable, which implies continuity. Specifically, for second-order differential equations, the solution must be twice differentiable to satisfy the equation. The discussion clarifies that while the phrase "interval of definition" is not commonly applied to the differential equation itself, it is essential for the functions involved. For initial value problems, the interval of definition encompasses the largest range containing the initial point where the solution remains sufficiently differentiable.

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Students and professionals in mathematics, particularly those focusing on differential equations, calculus, and mathematical analysis. This discussion is beneficial for anyone seeking to deepen their understanding of solution behavior in differential equations.

Ali Asadullah
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What is interval of definition of a solution of a Differential Equation?
How can we find the interval of definition of a differential equation?
What are the properties of this interval?
Is the solution of the DE and DE itself are continuous and differentiable on the interval?
 
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The interval of definition of a solution to a differential equation is the largest interval upon which is it "sufficiently" differentiable (a solution of a second order differential equation must be twice differentiable, etc.) from which is follows that it is continuous, and on which it satisfies the given differential equation.

I'm not sure I have ever seen the phrase "interval of definition" applied to a differential equation itself before. But I will say that it doesn't make sense to talk about the equation itself being "continuous and differentiable". I assume you mean that the functions in the differential equation are differentiable. Again, "differentiable" implies "continuous" so it isn't necessary to say that.
 
Dear Sir, if we are given an Initial value problem, say at x0, y=y0, then the interval of definition will be the largest interval containing the (x0,y0) on which the solution is "sufficiently differentiable. Am i right sir?
 

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