A random problem

September 30th, 2007 ~ Posted in: Mathematics

Let

 E = \{ f \in C^1([0,1]) \;|\; f(0) = 0 \text{ and } f(1) =1 \}

What is the greatest real number m such that

 m \leq \int_0^1 |f^\prime(x) - f(x)| \; dx

for any f \in E?

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