This article will appear in the 35^th Anniversary Issue of Performance Evaluation: An International Journal (Elsevier) in the fall of 2017.

Preface to the 35^th Anniversary Issue of Performance Evaluation.

It is a great honor to write a preface for this 35^th anniversary Issue of Performance Evaluation.  I take this opportunity to thank the late Martin Reiser (1986-1990), Werner Bux (1991-2007) and Philippe Nain (2008-2017) for their time and dedication in nurturing this journal to become a most important forum for researchers in the field of performance evaluation.  I would like to make some reflections for younger readers to see how this journal was born and has grown over the past 35 years. Continue Reading…

This article will appear in the 35^th anniversary issue of Performance Evaluation; An International Journal:, (Elsevier) in the fall of 2017.

Remembering Martin Reiser (May 15, 1943-July 25, 2017)

It is with great sadness that I report that Dr. Martin Reiser who served as the Editor-in-Chief of the Performance Evaluation journal from 1987 till 1990, died of cancer on July 25, 2017 in a hospital in Zurich. He is survived by his wife Verena and his sister Julia. Continue Reading…

I shall report in a series of articles my investigation on the famous 150 years old conjecture made by Bernhard Riemann (1826-1866) in 1859. The purposes of the reports are threefold: First, this writing effort will force me to study thoroughly prior arts on this subject, which should help my research towards a possible proof of the Riemann hypothesis (RH). Second, when I submit new results to mathematical journals and/or post them on arXiv (an online publication website) , I can refer to these articles on my website as for the background information, which will allow my journal paper(s) to be more concise than would be, otherwise. Third, if I am successful in compiling prior arts and my own results in a cohesive manner, this series of articles will serve as core materials for a book or monograph.

Furthermore, I hope that this series will stimulate some readers and make them interested in this fascinating and profound subject.

No. 1: Euler’s zeta function
No. 2: Riemann’s zeta function and the Riemann hypothesis
No. 3: Riemann’s xi function and the product form representation
No. 4: The Fourier transform representation of the xi function
No. 5: Some results on the ξ(s) and Ξ(t) functions associated with Riemann’s ζ(s) function
No. 6: Local Extrema of the Ξ(t) Function and The Riemann Hypothesis
No. 7: The Z(t) function, Gram’s Law, Riemann-von Mangoldt Formula, and Lehmer’s Phenomenon
No. 8: Negativity of d2/dt2 logΞ(t) and a conjecture on a sufficient condition for the Riemann hypothesis
No. 9: Application of the Euler-Maclaurin summation to log-differentials of M(t) = |ζ(1/2 + it)|

Hisashi Kobayashi
December 20, 2016

Leonhard Euler (1707-1783) Source: Wikipedia

Carl Friedrich Gauss (1777-1855)
Source: Wikipedia