Zeros of the Alternating Zeta Function on the Line R(S) = 1. - Jonathan Sondow (Am. Math. Mon., 2003)

Problem 11026. - Jonathan Sondow (Am. Math. Mon., 2003)

Double Integrals for Euler's Constant and in and an Analog of Hadjicostas's Formula. - Jonathan Sondow (Am. Math. Mon., 2005)

Problem 11132. - Jonathan Sondow (Am. Math. Mon., 2005)

A Faster Product for and a New Integral for ln. - Jonathan Sondow (Am. Math. Mon., 2005)

An Identity Involving Harmonic Numbers: 11026. - Jonathan Sondow; Richard Stong; Julien Grivaux (Am. Math. Mon., 2005)

Problem 11222. - Jonathan Sondow (Am. Math. Mon., 2006)

A Geometric Proof that Is Irrational and a New Measure of Its Irrationality. - Jonathan Sondow (Am. Math. Mon., 2006)

Problem 11322. - Jonathan Sondow (Am. Math. Mon., 2007)

Choice Bounds: 11132. - Jonathan Sondow; Richard Stong (Am. Math. Mon., 2007)

Problem 11381. - Jesús Guillera; Jonathan Sondow (Am. Math. Mon., 2008)

An Infinite Product Based on a Base: 11222. - Jonathan Sondow; et al. (Am. Math. Mon., 2008)

Ramanujan Primes and Bertrand's Postulate. - Jonathan Sondow (Am. Math. Mon., 2009)

A Double Integral: 11322 [2007, 835]. - Jonathan Sondow; George Lamb Tucson (Am. Math. Mon., 2009)

A monotonicity property of Riemann's xi function and a reformulation of the Riemann hypothesis. - Jonathan Sondow; Cristian Dumitrescu (Period. Math. Hung., 2010)

New Wallis- and Catalan-Type Infinite Products for α, e and. - Jonathan Sondow; Huang Yi (Am. Math. Mon., 2010)

Robin's Theorem, Primes, and a New Elementary Reformulation of the Riemann Hypothesis. - Geoffrey Caveney; Jean-Louis Nicolas; Jonathan Sondow (Integers, 2011)

Reducing the Erdős-Moser Equation 1n + 2n + ... + kn = (k+1)n Modulo k and k2. - Jonathan Sondow; Kieren MacMillan (Integers, 2011)

Proofs of Power Sum and Binomial Coefficient Congruences via Pascal's Identity. - Kieren MacMillan; Jonathan Sondow (Am. Math. Mon., 2011)

The Parbelos, a Parabolic Analog of the Arbelos. - Jonathan Sondow (Am. Math. Mon., 2013)

From the Monthly Over 100 Years Ago... - Jonathan Sondow (Am. Math. Mon., 2014)

Summation of Rational Series Twisted by Strongly $B$-multiplicative Coefficients. - Jean-Paul Allouche; Jonathan Sondow (Electron. J. Comb., 2015)

Power-Sum Denominators. - Bernd C. Kellner; Jonathan Sondow (Am. Math. Mon., 2017)

Primary Pseudoperfect Numbers, Arithmetic Progressions, and the Erdős-Moser Equation. - Jonathan Sondow; Kieren MacMillan (Am. Math. Mon., 2017)

The Denominators of Power Sums of Arithmetic Progressions. - Bernd C. Kellner; Jonathan Sondow (Integers, 2018)

Lorentz Stöer's Geometria et Perspectiva. - Jonathan Sondow (Am. Math. Mon., 2018)

Newton Quadrilaterals, the Associated Cubic Equations, and Their Rational Solutions. - Mowaffaq Hajja; Jonathan Sondow (Am. Math. Mon., 2019)

Hypergeometry of the Parbelos. - John M. Campbell 001; Jacopo D'Aurizio; Jonathan Sondow (Am. Math. Mon., 2020)