User talk:Lord Farin/Backup/Definition:Boolean Algebra

(Moved in from Definition talk:Group Action)
 * Two things:


 * Should the two definitions get their own subpages?
 * I have a genuinely alternative definition (via a poset; also a page Boolean Ring Induces Poset is in the pipeline) for Definition:Boolean Ring. Is the construct available here sufficiently appreciated that I may spread it out? --Lord_Farin (talk) 18:00, 22 August 2012 (UTC)


 * In order to stay consistent in style, I believe the two definitions should have their own pages, transcluded as ever.
 * Show what you got for Boolean Ring. Note that we had this conversation before on how to handle definitions. We either settle on Definition A as the definition, and then several iff pages to specify a variety of equivalent statements, or we allow each of these equivalent statements as equally valid definitions and put together a page (or a series of page) proving their equivalence. The latter may be preferable as it is more likely to accommodate expositions from different sources which treat any of the equivalent statements as the definition. So allowing equal status to all definitions is beginning to sound sensible to me. It may be an "added value" that other sites are not in a position to offer. --prime mover (talk) 18:57, 22 August 2012 (UTC)


 * Apparently, Deskins (I looked the source up via a web search portal and verified) is erratic in his terminology, since I was under the impression to be discussing Boolean ring as defined on WP; this is clearly not the case. This I found out after fruitlessly painstaking efforts to prove certain identities trivial in the poset approach (which I recalled from my BSc. thesis) algebraically. Ultimately, I decided it couldn't be done. See also this WP. My definition is (and this I did prove) equivalent to the def of Boolean algebra as on WP.
 * Having my own thesis and at least two books I own backing me up (and, but that doesn't really count, WP), I contend that we best proceed by at least adding a disambig on Boolean ring, and separate the Boolean ring and Boolean algebra defs. --Lord_Farin (talk) 21:31, 22 August 2012 (UTC)


 * Okay that makes sense. I have not encountered a Boolean ring as defined on Wikipedia. So I understand that what we have on PW is what WP defines as a Boolean algebra? If so, then a simple rename and also-known-as should do the trick. And the linking pages will need adjusting, of course. --prime mover (talk) 21:46, 22 August 2012 (UTC)

No, it's more severe: The notions are incompatible. A Boolean ring as we have it isn't even a ring. Neither does it originate from a poset since $*,\circ$ needn't satisfy the absorption laws. --Lord_Farin (talk) 21:48, 22 August 2012 (UTC)


 * Yes I know what we have is not a "Boolean ring". It even says so on the page itself, that it's not a ring. But it *is* an example of a Boolean algebra, yeah? So what I'm saying is, it can be renamed to Definition:Boolean Algebra (which is currently a redirect to the page Definition:Boolean Ring), and your (and WP's) definition of Boolean Ring can replace what's currently in Definition:Boolean Ring. Or is there something else more subtle than this? --prime mover (talk) 22:15, 22 August 2012 (UTC)


 * The categories the stuff is ought to be placed in have to be redetermined. But first, let me finish the second definition. --Lord_Farin (talk) 08:27, 23 August 2012 (UTC)