Мини-курс будет состоять из четырех лекций (11, 15, 18 и 22 декабря - это понедельники и пятницы). ... Gzipped postscript (47K; may be viewed directly by some versions of Ghostview) . Zipped postscript (47K) . Postscript (53K) | Zipped postscript (23K) ] . A new class of associative algebras (so-called family algebras) is introduced and investigated. ... A family algebra is a sort of a finite approximation to the enveloping algebra $U(\g)$ viewed as a module over its center. ...