partial sums spiralling toward the non-trivial zeros on the critical line
Plate II
s0.5 + 14.13i
ζ(s)—
|ζ(s)|—
Near zero—
Each term n−s is a vector; their running sum spirals inward to ζ(s).
On the critical line the path closes on the origin exactly at a zero.
After 3Blue1Brown · Riemann (1859)