p 143, item 1.82(10). The theorem should read: A functor that preserves pre-limits preserves limits. p 206, line 2: the capital P (denoting a point in a projective plane) should be a small p. I only got the book today, but the first impression is certainly very promising. J"urgen Koslowski Department of Mathematics Kansas State University koslowj@math.ksu.edu Subject: EECS '91 EAST EUROPEAN CATEGORY SEMINAR '91 Bulgaria, Predela, March 11-18, 1991 The Sixth Annual East European Category Seminar (EECS '91), organised by the Institute of Applied Mathematics and Computer Science of the Technical University of Sofia, Bulgaria, will take place in Predela, Bulgaria, the week of March 11 through 18, 1991 (Monday through Monday). Note that the timing is so arranged that APEX air fares requiring a Saturday night abroad are perfectly eligible for use. It is hoped, moreover, that most or all of the time of the meeting may fall during "spring break" periods at the participants' universities. The Organisers expect prospective participants to send a camera-ready copy of a summary of their projected contribution on 8.5"x11" paper or on the nearest DIN equivalent (circa 20x28.3 cm^2). Participants are expected to arrive in Sofia not later than late mid- afternoon of March 11, in time to be able to board a complimentary chartered bus to Predela departing from the parking lot of the Technical University at 5:30 pm March 11. Participants arriving earlier that day may check luggage in Room 2226, one flight up in the building known as Block 2, Durvenitsa, which houses the Institute of Applied Mathematics and Computer Science. The bus ride, of some two to three hours to the ski country south of Sofia, will arrive in time for supper at Predela. The return to Sofia on March 18 will be by the same bus, leaving Predela right after breakfast, so return reservations from Sofia are most conveniently planned for no earlier than noon of March 18, and preferably somewhat later. During the time in Predela, room and board are offered at utterly nominal cost (by Western standards -- last year, the week cost under $30.00 -- should be approximately similar this year, too, I believe). Predela may be found on the map of Bulgaria by following the main road south from Sofia to Simitli, just past Blagoevgrad, and then turning east for some dozen kilometers to what should be the first (maybe the only) saddle. The meeting site is some 400 meters off the road, and some 500 meters from a local inn/tavern offering excellent wine, beer, rakia, and yogurt when it's in stock. Bulgaria still has a visa requirement, at least for US citizens. Citizens of other countries should check with their local Bulgaria Embassy or Consulate, or consult a reputable visa-procurement agency fairly well in advance. The Embassy in Washington, D.C., issues visas with a maximum validity period of three months. Normal handling requires a three-week turn-around period, but anyone who can get to the Embassy in person may request "express" service: for a small additional fee, the visa is issued on the spot, then and there. (Ever since the USPS "lost" my freshly visaed passport for over a month, not finding it until *after* I had returned from EECS '89, I've only applied in person!) The organisers recommend attaching their Official Invitation letter (copy available from me, flinton@eagle.Wesleyan.EDU, by regular mail, if you send me your full name and postal address) to the Bulgarian visa application (but I've always just declared "tourism -- late winter holiday" and never had a problem). Those intending to participate should make their intentions -- and, ultimately, their travel plans, specifying dates, times, and flight/train numbers -- known as soon as possible. Addresses to use: for preliminary intentions: Prof. V. V. Topencharov Technical University, Sofia Institute of Applied Mathematics and Computer Science BG-1000 SOFIA, P.O. Box 384 Bulgaria or: flinton@eagle.Wesleyan.EDU for last-minute arrival info: Phone: +359 (02) 68-20-83 TELEX: +865 22575 (EECS'91, LOZANOV) (NB: there is another telex number, 22755 , in circulation, but as near as I can make out that one's a typo, and it's the former, the 22575, that works.) Participant numbers for the previous five meetings have been roughly 20, 30, 40, 50, 30, in sequence (the drop back to thirty due most likely to greater than usual uncertainty, back at the end of 1989, as to what the spring would produce in the way of Eastern European unrest in Bulgaria). -- Fred Fred E.J. Linton Wesleyan U. Math. Dept. 649 Sci. Tower Middletown, CT 06457 E-mail: <FLINTON@eagle.Wesleyan.EDU> or <fejlinton@{att|mci}mail.com> Tel.: + 1 203 776 2210 (home) or + 1 203 347 9411 x2249 (work)