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how i prove that space of defrential function not closed?

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- Thread starter lady99
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- #1

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how i prove that space of defrential function not closed?

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Fredrik

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{x:xis polynomail} subset c[a,b]}

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Is this correct? If so, which topology? Don't hold back!

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HallsofIvy

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So I take it you want to show that the set of all polynomials is not closed as a subset of the set of all differentiable functions on some interval.

But it is still not clear if you mean "closed" under some operation or "closed" in some topology. And, we would need to know what operation or topology is involved.

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