Here is a question that Stephen Bloom asked me to place on this list. You may reply to him at bloom@.... Are there charaterization theorems for...
Walter Taylor
wtaylor@...
Nov 3, 2004 4:33 am
243
... There is something missing in the definition (links please). What is v ? Apparently v is an interpretation on a groupoid of the original terms. A. Mani ...
... v = var. All Steve is saying here is that an equation is super-regular when (a) the two sides have the same "fringe," meaning the same list of variables...
Vaughan Pratt
pratt@...
Nov 4, 2004 7:20 am
245
I just noticed that my last sentence, ... conflicts with Steve's no-repetition rule. The spirit of that restriction might survive under the condition that...
Vaughan Pratt
pratt@...
Nov 4, 2004 10:02 am
246
A Mani wrote: ``There is something missing in the definition (links please). What is v ? Apparently v is an interpretation on a groupoid of the original terms....
Matt is correct. Mani wrote: ``There is something missing in the definition (links please). What is v ? Apparently v is an interpretation on a groupoid of the...
(actually not Walter's definition. I merely copied what was sent to me.) wt...
Walter Taylor
wtaylor@...
Nov 4, 2004 3:28 pm
249
Subject: 2006 AMS/MAA Special Session Greetings one and all, We (John Snow and Japheth Wood) are considering organizing a special session at the January...
Every ideal of a boolean algebra B is a sublattice of B. Is it a boolean sub algebra of B.If not Can you direct me to give an exaple in this case. with regds ...
... Hint: The ideal is a sublattice if you define "lattice" in a weak sense of having binary meets and joins. Is it still a sublattice if you define "lattice"...
Steve Vickers
s.j.vickers@...
Nov 18, 2004 11:05 am
253
Freredejesus asked about homogeneous algebras. I had never heard of them before (although it seems I probably should have...). They do not turn out to be...
Srinivasa Rao Tanniru asked if every ideal of a boolean algebra is a boolean subalgebra. The answer is very strongly no. Consider the ideals of the power set...
Querying Google with "homogeneous algebras" turns up "about 88,800" entries, the first few of which are Matt's (see below). The full Google link seems to...
Fred E.J. Linton
flinton@...
Nov 22, 2004 8:40 am
259
Hello! A friend of mine has the following problem: Is there a finite non-commutative semifield? A semifield is a structure (S, +, 0, *, 1) such that ... A...
Dragan Ma€ ˘Ĺˇulovi€ ...
masul@...
Nov 22, 2004 11:17 am
260
... Do you mean for 0 to be an element of the multiplicative group, and also to be an absorbing element? That forces |S|=1. If the second axiom was supposed to...
Dear folks, A good source for the construction of semifields, including finite non-commutative ones, is in the survey article E. G. Goodaire and M. J....
JB Nation
jb@...
Nov 22, 2004 11:59 pm
263
... But these semifields satisfy different axioms than the ones supplied by Dragan. In fact, I think that the only finite semifields (as defined by Dragan,...
Of course, (S - {0}, *, 1) is supposed to be a group. Sorry for that. Thank you very much for your help! ... From: Keith A. Kearnes...
Dragan Ma€ ˘Ĺˇulovi€ ...
masul@...
Nov 23, 2004 10:23 am
266
The question under discussion (and even a little bit more) has completely been resolved---all finite semifields have been described---in Corollary I.5.9 (b)...
Yefim Katsov
katsov@...
Nov 23, 2004 8:07 pm
267
In a brief note in Math. Japon. 5 (1958-59), 21-24 that I wrote, it follows immediately from corollary 7 that any finite semifield D in which 1 + a = a +1 for...
melvin henriksen
henriksen@...
Nov 23, 2004 9:59 pm
268
Dear Ralph, I think I will send you some math questions over the holidays, when I read what JB sent us. Now, I just wonder if you (or a secretary) sent me any ...
Kira Adaricheva
ki13ra@...
Nov 24, 2004 7:07 am
269
Dear all, sorry for the previous message, I used the reply function without noticing the wrong address. It was intended for one person only. Just delete both ...
Kira Adaricheva
ki13ra@...
Nov 24, 2004 7:12 am
270
On behalf of a friend, I would like to ask the knowledgeable people on this list about the following problem: Is there a description of the varieties V (or a...
Luis Sequeira
lsequeir@...
Dec 9, 2004 11:09 am
271
... I'm having trouble guessing how you mean "\". Are you asking that x and y in F "be" constants? If so, and if by "constant" you mean the sort of element...
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