JACQUES OFFENBACH: HIS CENTENARY

Von Helmholtz: His Ophthalmoscope and Its Centenary

Centenary of his embryo transfer experiments

About 100 years ago, on 27 April 1890, Walter Heape transferred rabbit embryos from one mother to another. One animal became pregnant and delivered young from the transferred embryos. Thus the first mammalian embryo transfer experiment was successfully completed. In this paper, I describe these experiments in some detail and then analyse why they were done. I place this embryo transfer work in ...

Reflections on Paul Erdős on His Birth Centenary, Part II

This is Part II of the two-part feature on Paul Erdős following his centennial. Part I had contributions from Krishnaswami Alladi and Steven G. Krantz, Vera T. Sós and László Lovász, Ronald Graham and Joel Spencer, Jean-Pierre Kahane, and Mel Nathanson. Here in Part II we have six articles from contributors Noga Alon, Dan Goldston, András Sárközy, József Szabados, Gérald Tenenbaum, and Stephan ...

Lionel Sharples Penrose, 1898-1972: A personal memoir in celebration of the centenary of his birth.

IT is Friday, mid-morning. You are about to leave the cards. The children were given books and within 5 minutes were engrossed in some of Lionel’s handmade city for a long weekend in the country when you find yourself opening your front door to four bedraggled wooden puzzles. We had met Professor Lionel (Figure 1) and Dr. Marpolitical refugees. It is difficult for you even to recognize the wear...

A celebration of Alan Turing's achievements in the year of his centenary

In this paper, we review some of the main achievements and contributions of Alan Turing to Computer Science and related areas.