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Fractional derivatives Real part (left graphic) and imaginary part (right graphic) of the fractional derivatives of  . Real part of the fractional derivatives of  over the  . Weierstrass-Riemann function The everywhere continuous, but almost nowhere differentiable generalized Weierstrass-Riemann functions  (red),  (green), and  (blue). Here  . Weyl sums Weyl sums of the form  for various  . Zeros of the continued fraction expansion Real parts of the roots of the first  terms of the denominators of the continued fraction expansion of  in the  . As  increases from 0 to 60, the roots are colored from red to violet and cluster along the branch cuts.
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