visualizing the Riemann hypothesis and analytic continuation by 3Blue1Brown (2016) is a good quick visual non-mathematical introduction is to it.
One of the Millennium Prize Problems and Hilbert's problems.
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The Riemann zeta function, denoted as \(\zeta(s)\), is a complex function defined for complex numbers \(s = \sigma + it\), where \(\sigma\) and \(t\) are real numbers.