: the 6th letter of the Greek alphabet see Alphabet Table
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The mysterious way in which the zeta zeros always improve the estimate is the subject of the Riemann hypothesis.—Lyndie Chiou, Scientific American, 3 Mar. 2026 The zeta function lives in the complex plane and is tied to oscillating sums/products; small analytical gaps can ruin a proof.—John Werner, Forbes.com, 16 Jan. 2026 Stable dispersions lasted for up to a month, supported by strong negative zeta potentials in both water and ethanol.—Rupendra Brahambhatt, Interesting Engineering, 20 Dec. 2025 The Riemann zeta function is one of the most central functions in number theory, and mathematicians had been trying for centuries to prove the irrationality of ζ(3) — the number that the zeta function outputs when its input is 3.—Erica Klarreich, Quanta Magazine, 8 Jan. 2025 In 1859, Bernhard Riemann, another renowned German mathematician, sought help from a different function, now called the Riemann zeta function.—Byzack Savitsky, science.org, 29 July 2024