LIVING VALUES NEMZETKÖZI OKTATÁSI PROGRAM A NEUMAN JÁNOS EGYETEM PEDAGÓGUSKÉPZŐ KARÁN

2 János Kollár

Shlomo p. Neuman: a brief autobiography.

Prologue I thank Ground Water and its editor for the privilege of sharing some highlights of my personal and professional lives with colleagues. The story of my childhood, which is a key to understanding who I am, might otherwise have never been told: I owe it to our younger colleagues, my children, and my grandchildren. I urge the reader to explore further the historical events and circumstanc...

Real Face of János Bolyai Tamás Dénes

I n Vol. 56, No. 11, of Notices, I saw a fascinating article with the title: Changing Faces—The Mistaken Portrait of Legendre. The author, Peter Duren, writes with understandable bewilderment: “It seems incredible that such egregious error could have gone undetected for somany years.” This encouraged me to publish, in the same journal, the story—no less fascinating—of the real face of János Bol...

János Kollár and Sándor J Kovács

1. INTRODUCTION A recurring difficulty in the Minimal Model Program (MMP) is that while log terminal sin-gularities are quite well behaved (for instance, they are rational), log canonical singularities are much more complicated; they need not even be Cohen-Macaulay. The aim of this paper is to prove that, as conjectured in [Kol92, 1.13], log canonical singularities are Du Bois. The concept of D...

Colloquia Mathematica Societatis János Bolyai

1 . Our investigations might be suggested by a sort of optimalization problem which could be described vividly in practical terms as follows : suppose we are given a network of routes on which there are critical points endangered by fire. We want to place fire stations at an appropriate number of points from which any endangered point can be reached within a given time interval in case of emerg...