constant c is c>1
this integral is shown in mangoldt's explicit formula proof.
i cant make the image the larger.
integral from c-i∞ to c+i∞ (e^(sx))/s ds is the image.
see link:[SOLVED] Von-Mangoldt Explicit Formula
i couldnt understand 1/2 if x=0
i think that must be∮ 1/x dx=2ipi
integral (e^-x)/x is why 0?
that so difficult to me