A tribute to Hans Schneider

Hans Thoenen: A Tribute

Hans Thoenen: 1928–2012 Hans Thoenen passed away on June 23, 2012, a fewmonths after being diagnosed with lung cancer. He left us grateful for what he had been able to accomplish in his life as scientist, but he was neither exuberant nor proud. Hans remained extraordinarily modest about his achievements—he felt far more comfortable by understating his contributions and never liked receiving com...

Analysis of paleomagnetic data: a tribute to Hans Zijderveld. Introduction

This special issue of ‘Geologie en Mijnbouw’ is dedicated to Professor Hans Zijderveld, head of the paleomagnetic laboratory ‘Fort Hoofddijk’ of Utrecht University until March 1995. Hans was among the founders of this laboratory and he guided the paleomagnetic group at Utrecht throughout his career. The value of his many contributions to the field of paleomagnetism are best seen in the perspect...

A Tribute to Late Professor Mahlagha Ghorbanli

This edition of IJPP celebrates ten years of steady publication of Iranian Journal of Plant Physiology. The story of IJPP is that of a journey that started from a local forum where the researchers and scholars mainly from the Islamic Azad University could share findings of their studies, gradually developing into an international peer-reviewed jour...

Membrane Science and Research: A Tribute to Professor Takeshi Matsuura

Small Quantum Groups and the Classification of Pointed Hopf Algebras Nicolás Andruskiewitsch and Hans-jürgen Schneider

In this paper we apply the theory of the quantum groups Uq(g), and of the small quantum groups uq(g) for q a root of unity, g a semisimple complex Lie algebra, to obtain a classification result for an abstractly defined class of Hopf algebras. Since these Hopf algebras turn out to be deformations of a natural class of generalized small quantum groups, our result can be read as an axiomatic desc...