Critical strip

The critical strip is the region of the complex plane where $0<\operatorname{Re}(s)<1$.

The non-trivial zeros of the Riemann zeta function lie in this strip. The Riemann Hypothesis makes the much sharper claim that all of them lie on the line running down its middle, $\operatorname{Re}(s)=1/2$.

See also: complex plane, non-trivial zero, critical line, Riemann Hypothesis..