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maethaddict
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Homework Statement
Def. f is Schwarz Differentiable at a pt c in its domain if
lim(h->0) [f(c+h)-f(c-h)]/2h exists as a finite limit.
1.)Prove or disprove: f is differentiable at c => f is Schwarz Differentiable at c
2.)Prove or disprove: f is Schwarz Differentiable at c => f is differentiable at c
Homework Equations
a function f is differentiable at c if lim(x->c) [f(x)-f(c)]/[x-c] exists
The Attempt at a Solution
My suspicion, from picturing each derivative, is that 1 is true and 2 is false. To prove 1, I've tried to set h=|x-c| and evaluate the derivative for x>c, and x<c and then use some linear combination of those limits to derive the schwarzian derivative, but I keep running into problems with extra terms.
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