From pjt@ARL.MIL Mon Dec 21 10:24:25 1998 Received: from cad.arl.mil (cad.arl.mil [128.63.247.128]) by clinch.math.niu.edu (8.9.1a/8.9.1) with SMTP id KAA13345 for ; Mon, 21 Dec 1998 10:24:25 -0600 (CST) Date: Mon, 21 Dec 1998 11:16:44 EST From: Paul Tanenbaum To: rusin@math.niu.edu cc: pjt@ARL.MIL Subject: http://www.math.niu.edu/~rusin/known-math Message-ID: <199812211116.aa07962@CAD.ARL.MIL> Status: R Dave, Nice accomplishment you have here. One quibble, though, concerning a field of interest to me personally. 06-XX.html gives the impression that this field in the subject classification is limited to, or largely to, lattices. Not true! There's tons of work included here being done on general posets that's more combinatorial than algebraic, including dimension theory, isomorphism problems, etc. For references, you ought to include W. T. Trotter, _Combinatorics and Partially Ordered Sets: Dimension Theory_, Johns Hopkins Series in Mathematical Sciences, Johns Hopkins Univ. Press, Baltimore, 1992. A journal dedicated to this kind of work, including lattice theory, is _Order_, which is published by Kluwer. Regards, Paul From rusin@math.niu.edu Mon Dec 21 11:32:22 1998 Received: from vesuvius.math.niu.edu (vesuvius.math.niu.edu [131.156.3.93]) by clinch.math.niu.edu (8.9.1a/8.9.1) with ESMTP id LAA13966; Mon, 21 Dec 1998 11:32:21 -0600 (CST) From: Dave Rusin Received: (from rusin@localhost) by vesuvius.math.niu.edu (8.8.8/8.8.5) id LAA13186; Mon, 21 Dec 1998 11:32:21 -0600 (CST) Date: Mon, 21 Dec 1998 11:32:21 -0600 (CST) Message-Id: <199812211732.LAA13186@vesuvius.math.niu.edu> To: pjt@ARL.MIL Subject: Re: http://www.math.niu.edu/~rusin/known-math Cc: rusin@math.niu.edu Status: R Thank you for the suggestions. My own experience with 06 was limited to rather algebraic material, but I had just recently been fine-tuning some of the other introductory material here and noticed that by rights 06 ought to be more combinatorial than algebraic (see the picture at index/tour_alg.html so your comments seem both on-target and well-timed! Thanks also for the compliments. dave