I have a simple characterization of the absolute retracts in a variety of algebras: An algebra A is an absolute retract if and only if it is (i) equationally...
p_ouwehand asked: " I have a simple characterization of the absolute retracts in a variety of algebras: An algebra A is an absolute retract if and only if...
mhebert
mhebert@...
May 15, 2005 5:20 pm
296
These sound like results of Walter Taylor from the early '70's publshed in Algebra Universalis...
Hello, I would like to pursue a research in Mathematics someday. I have a strong interest in mathematics. I also did a project titled 'Generalized study of...
I have a paper on lattice drawing which has several diagrams with some explanation. It's on the web at ...
ralph@...
May 28, 2005 3:40 am
301
Help! please, I want to justify this assertion: let A be an algebra ,f a congruence on A if f(a,b)=f(c,d) then there exist a unary polynomial function l on...
Help! please, I want to justify this assertion: let A be an algebra , if f(a,b)=f(c,d) then there exist a unary polynomial function l on A such that...
... polynomial function l on A such that a=l(c) and b=l(d) ... (a,b) thanks for your help before! I don't know all the literature well, but here's an easy ...
... If it is true for every algebra in a variety V iff V is congruence permutable. [ (->) Since (y,x) \in \Cg(x,y) in F_V(x,y), there is a polynomial l such...
SECOND ANNOUNCEMENT OF TWO SPECIAL SESSIONS ON UNIVERSAL ALGEBRA AND LATTICE THEORY Note: You are receiving this because you are included on the Algebra ...
mth_jws11
mth_jws11@...
Jun 22, 2005 11:48 pm
307
Hi! Consider a finite distributive lattice L. One may assume that L is a sublattice of a power set of some finite set. Denote by j1,..., j_r all with join...
A quick question. Could anybody drop me some references about characterizing the congruences ~ of an arbitrary algebra that make A/~ abelian, and those that...
~~ ~~~ read The SpacePlane Equation first, http://web.archive.org/web/20050217045027/www.physicsroom.org.nz/log/ archive/15/spaceplanes/ then some of the...
~~ ~~ ok, I heard that! imagine if the women of the western world gave up their cars -- for 'inner' travel -- and thus made no more war on the middle east and...
Hello every body , I have a question in categories. Please help me to solve it. Let f:X --> Y be a M-mapping then show that : 1) f is injective <--> f is...
To answer Sara Raja's questions about the category of M-sets and M-mappings in relatively general terms, let me observe first that this category is both: (i) a...
Fred E.J.Linton
flinton@...
Feb 13, 2006 12:57 am
314
Correction: I had mistakenly written ... where I had intended the last phrase to be ... Apologies. A corrected version appears below. -- Fred ... Received:...
Fred E.J.Linton
flinton@...
Feb 13, 2006 1:10 am
315
Dear Universal Algebraists and Friends, I want to thank everyone for making our special sessions at the recent AMS meetings in Lincoln and San Antonio both...
Jonathan David Farley has an op-ed in today's New York Times. Mentions lattice theory and graph theory. wt...
Walter Taylor
wtaylor@...
May 16, 2006 3:32 pm
317
... Yes, it mentions concept lattices, in fact. Nothing too detailed, but I promptly printed it and put it on my office door. By the way, someone should point...
* Dear Universal Algebraists, * * This message found its way to me earlier today. I am sorry to * pass on this news. I know that you will be saddened, as I...
Hi all, I'm just wondering about the status of the last open problem in Burris&Sankappanavar: "If a finitely generated variety has no infinite subdirectly ...
See my three papers in the International Journal of Algebra and Computation, volume 6, 1996. Ralph McKenzie --On Friday, June 23, 2006 8:33 AM +0000 p_ouwehand...
Mckenzie, Ralph N
mckenzie@...
Jul 8, 2006 7:17 pm
321
100 Years of E=mc2 Ajay Sharma (The Fundamental Physics Research Institute, ) 2006. ISBN: 1-60021-270-0. $49. Hardcover Author Email...
Hi, I have been looking at a situation which is basically the dual of a subdirect product: you have several algebras B_i, and a homomorphic image of the sum...
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