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plot re(log((zeta(x i)) / (Zeta(1+x i)))) + i(1/2 ln (|x|)) -i 0.9189385332 from -1 TO 1
plot re(log((zeta(x i)) / (Zeta(1+x i)))) + i(1/2 ln (|x|)) -i 0.9189385332 from -1 TO 1
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