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Topic: Boolean prime ideal theorem


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  Robert Cowen's Page
A new proof of the compactness theorem for propositional logic, Notre Dame J. Formal Logic 11, 79-80.
1996, A compactness theorem for linear equations (with W. Emerson), Studia Logica,57, 355-357.
G-free colorability and the Boolean prime ideal theorem (with S.H.Hechler), Scientiae Mathematicae Japonicae, 59, no.2, 257- 263 (pdf file).
home.nyc.rr.com /rcowen   (504 words)

  
 Learn more about Boolean algebra in the online encyclopedia.   (Site not responding. Last check: 2007-10-18)
The two-element Boolean algebra is also important in the general theory of Boolean algebras, because an equation involving several variables is generally true in all Boolean algebras if and only if it is true in the two-element Boolean algebra (which can always be checked by a trivial brute force algorithm).
Every Boolean algebra (A, ∧, ∨) gives rise to a ring (A, +, *) by defining a + b = (a ∧ ¬b) ∨ (b ∧ ¬a) (this operation is called "symmetric difference" in the case of sets and XOR in the case of logic) and a * b = a ∧ b.
An ideal of the Boolean algebra A is a subset I such that for all x, y in I we have x ∨ y in I and for all a in A we have a ∧ x in I.
www.onlineencyclopedia.org /b/bo/boolean_algebra.html   (1669 words)

  
 [No title]
A proper ideal I is called a prime ideal if for all ab in I it follows either a or b in I.
Similarly, the right ideals are submodules of R as a right module over itself, and the two-sided ideals are submodules of R as a bimodule over itself.
Ideals are important because they appear as the kernels of ring homomorphisms and allow one to define factor rings, as will be described next.
en-cyclopedia.com /wiki/Maximal_ideal   (1185 words)

  
 ipedia.com: Ideal (ring theory) Article   (Site not responding. Last check: 2007-10-18)
An ideal can be used to construct a factor ring in a similar way as a normal subgroup in group theory can be used to construct a factor group.
The sum and the intersection of ideals is again an ideal; with these two operations as join and meet, the set of all ideals of a given ring forms a lattice.
The term "ideal" comes from the notion of ideal number: ideals were seen as a generalization of the concept of number.
www.ipedia.com /ideal__ring_theory_.html   (1435 words)

  
 Ultrafilter lemma - Wikipedia, the free encyclopedia
This statement is in fact an easy consequence of the Boolean prime ideal theorem that is commonly used in order theory.
Note: It seems to be quite reasonable to merge this article into other articles: most of all Boolean prime ideal theorem, but the characterization of ultrafilters (maximal filters, prime filters) of Boolean algebras of which the above proof is a special instance, would fit well into Boolean algebra.
It would also be helpful to clarify whether this entails the Boolean prime ideal theorem (thus being equivalent) or not.
en.wikipedia.org /wiki/Ultrafilter_Lemma   (353 words)

  
 Business Software Review : Article 'Prime ideal'   (Site not responding. Last check: 2007-10-18)
In mathematics, a prime ideal is a subset of a ring which shares many important properties of a prime number in the ring of integers.
Prime ideals in order theory are treated in the article on ideals in order theory.
Assume the ideal M is maximal with respect to disjointness from the filter F.
www.business-software-review.org /DisplayArticle49366.html   (852 words)

  
 Search Results for theorem*   (Site not responding. Last check: 2007-10-18)
The theorem relating convergence almost everywhere and uniform convergence by D F Egorov, one of Bugaev's pupils, in 1911 is seen as marking the beginning of the Moscow school of the theory of functions of a real variable.
Theorem 2 of Euclid's Phaenomena consists of four propositions with proofs for only three of them while the missing one is replaced by the remark "that this is the case has been shown elsewhere"; indeed theorem and proof are found as Theorem 10 in Autolycus's 'Rotating Sphere'.
The theorem is then a sort of topological form of the particle-wave equivalence of quantum mechanics, and the quest for 'truly' understanding these and analogous dualities has been one of the great motivating forces in the mathematics of the last fifty years.
www-groups.dcs.st-and.ac.uk /history/Search/historysearch.cgi?SUGGESTION=theorem*&CONTEXT=1   (15447 words)

  
 Boolean prime ideal theorem   (Site not responding. Last check: 2007-10-18)
An ideal in a Boolean algebra A is a subset I of A such that
In Boolean algebras, unlike rings in general, there is no difference between a prime ideal and a maximal ideal.
Because within the Zermelo-Fraenkel axioms of set theory, it is strictly weaker than the well-known theorem of algebra of which it is but a special case, and mathematical logicians have taken an interest in showing that it is formally equivalent to various other propositions in mathematics.
www.theezine.net /b/boolean-prime-ideal-theorem.html   (234 words)

  
 [No title]
Tychonoff's theorem is complex, and its proof is often approached in parts, proving helpful lemmas first.
Boolean prime ideal theorem -- a choice principle strictly weaker than AC.
To prove that Tychonoff's theorem in its general version implies the axiom of choice, we establish that every infinite cartesian product of non-empty sets is nonempty.
en-cyclopedia.com /wiki/Tychonoff's_theorem   (886 words)

  
 Graduate Study in Algebra
The "symmetric" groups of all permutations of a set are investigated, and the Cayley theorem (showing an arbitrary abstract group may be regarded as a subgroup of some symmetric group) is proved.
The goal of the course is the fundamental theorem of Galois theory and the solutions to the three pearls of antiquity: the quadrature of the circle, the trisection of an angle, and the duplication of the cube.
The following topics are studied: the isomorphism theorems for groups, solvability of p-groups, simplicity of the alternating group on at least 5 letters, Sylow theorems, Jordan-Holder Theorem, principal ideal domains, Gauss' lemma, Eisenstein's criterion, the fundamental theorem of Galois theory, finite fields, cyclotomic fields, solvability of equations by radicals.
www.math.uiuc.edu /GraduateProgram/researchmath/gradalgebra.html   (1660 words)

  
 [No title]
However, we stress that the main results (Theorem 0.4 and Corollary 0.5 below) are true * *for unsta- ble finitely generated K - modules over an unstable noetherian algebra K (Theor* *em 3.9 and Corollary 3.10) and the proof in the case of equivariant cohomology require* *s the same machinery as in the general case.
The category O(a) should be thought o* *f as the analogue of the open complement (in the classical prime ideal spectrum) of * *the subset V (a) which is defined by a.
There one co* *nsiders an ideal a in a noetherian commutative ring R and the derived functors of the functor a,* * which associates to an R - module M its a - torsion submodule.
hopf.math.purdue.edu /Henn/kmod.txt   (7623 words)

  
 Ideal   (Site not responding. Last check: 2007-10-18)
Homomorphisms and ideals ; Factor ring : Given a ring R and an ideal I of R, the factor ring is the set R/I of cosets {a+I : a R} together with operations (...
See live article   Principal ideal In abstract algebra, a principal ideal is an ideal I in a ring R that is generated by a single element a of R. More specifically: a left principal ideal of R is a subset of R of the form Ra := {ra : r in R};...
See live article   Boolean prime ideal theorem Basic definition An ideal in a Boolean algebra A is a subset I of A such that Superficially this may look different from the concept of an ideal in a ring.
www.lindacannongallery.com /48/barry.html   (908 words)

  
 Rings
Closely related is the notion of ideals, certain subsets of rings which arise as kernels of homomorphisms and can serve to define factor rings.
In commutative ring theory, numbers are often replaced by ideals, and the definition of prime ideal tries to capture the essence of prime numbers.
Principal ideal domains are integral domains in which every ideal can be generated by a single element, another property shared by the integers.
www.risberg.ws /Hypertextbooks/Mathematics/Algebra/rings.htm   (890 words)

  
 [No title]
It is proved that an ideal I of a lattice L is semiprime iff I is the kernel of some homomorphism of L onto a distributive lattice with 0.
Irreducible orthomodular lattice with Boolean quotients are studied in [], where a nontrivial example of an irreducible orthomodular lattice is found, all proper quotients of which are Boolean algebras.
Recall that an ideal in a lattice L is a subset I of L such that a
tph.tuwien.ac.at /~svozil/publ/pul.htm   (1274 words)

  
 LFCS Theory Seminar -- Tuesday 13 July 1999
Intervals in boolean algebras enter into the study of conditional assertions (or events) in two ways: directly, either from intuitive arguments or from Goodman, Nguyen and Walker's representation theorem, as suitable bearers of conditional probabilities, or indirectly, via a representation theorem for the family of algebras associated with de Finetti's three-valued logic of conditional assertions/events.
The representation theorems and an equivalent of the boolean prime ideal theorem yield an algebraic completeness theorem for the three-valued logic.
Adequacy with respect to a family of Kripke models for de Finetti's logic, Lukasiewicz's three-valued logic and Priest's Logic of Paradox is demonstrated.
www.lfcs.inf.ed.ac.uk /events/theory-seminars/99.07.13.html   (213 words)

  
 [No title]   (Site not responding. Last check: 2007-10-18)
Prime numbers are those that can be divided only by themselves or one.
If you announced that you had an algorithm which could find the prime factors of a given number much faster than is currently possible, I guarantee you would attract the intense attention of everyone interested in data encryption and verification problems, including various "three-letter" government agencies.
So while the actual value of the largest known prime is perhaps a curiousity, the techniques and machinery used to find them are of the greatest theoretical and practical importance.
felix.unife.it /Root/d-Mathematics/d-The-mathematician/t-Mathematics-on-Compuserve   (12825 words)

  
 <Data Minds> - tribe.net   (Site not responding. Last check: 2007-10-18)
An urn problem is an idealized thought experiment in which some objects of real interest (such as atoms, people, cars, etc.) are represented as colored balls in an urn or other container.
The Löwenheim-Skolem theorems tell us that if we restrict ourselves to first-order logic, any axiom system for the reals admits other models, including both models that are smaller than the reals and models that are larger.
The idea that alternative mathematical systems might exist was very troubling to mathematicians of the 19th century and the developers of systems such as Boolean algebra made elaborate efforts to derive them from traditional arithmetic.
lovechao.tribe.net /thread/b117884e-cfcf-414c-a8ff-fd5be7fb0705   (2295 words)

  
 \1cw 3
In this paper it is attempted to relate the definitions of the fuzzy subset lattices with the other classical definitions of Postean and Boolean lattices in the context of Universal algebra.
In particular it is obtained a kind of equivalence (mutual isomorphic representations) of the fuzzy subsets, Postean and Boolean lattices.
The previous equivalence theorems have important consequences in a kind of equivalence, up-to-lattices of the Fuzzy, 3-valued and 2-valued Logic.
www.softlab.ntua.gr /~kyritsis/PapersInMaths/LogicandFuzzy/TransFuz.htm   (1656 words)

  
 Schechter: papers and books
Kelley's specialization of Tychonov's Theorem is equivalent to the Boolean Prime Ideal Theorem, Fundamenta Mathematicae 189 (2006), 285-288.
We construct a family of Banach spaces whose bounded sets are precisely the subsets of KH[0,1] that are equiintegrable and pointwise bounded.
The author's style is clear and approachable, and, consequently, this book seems to be ideal for beginning students of both mathematics and philosophy, as well as for students of computer science and the large circle of logicians working in the field of nonclassical logics.
www.math.vanderbilt.edu /~schectex/papers   (1426 words)

  
 [No title]
Topics: axioms for the real numbers; the Riemann integral; limits, theorems on continuous functions; derivatives of functions of one variable; the fundamental theorems of calculus; Taylor's theorem; infinite series, power series, rigorous treatment of the elementary functions.
Integer and polynomial GCD computation, modular arithmetic, Chinese remainder theorem, Jacobi symbol computation, primality testing, extracting square roots mod primes, integral lattices, factorization of polynomials over the rationals, simultaneous diophantine approximations, solving binary quadratic and cubic modular equations, application to public-key cryptography.
Analytic proofs of the finiteness of the class-number, the unit theorem, and discriminant bounds.
www.mit.edu:8001 /afs/athena.mit.edu/project/net_dev/thorne/crs18.txt   (7168 words)

  
 Index 1-26
Using the definition of an ideal of a poset introduced by Doctor, the Author shows that more posets are representable as compact-open sets of Stone spaces than in the case where the definition of Frink is used (as he has done in a preceding paper).
The main theorem shows that the natural description of the closure/density of a completion is equivalent to the fact that the completion reflectors are exactly those reflectors which preserve embeddings.
The continuity of the arrow in the topos with respect to the topology of Banach corresponds exactly to the condition that the function is holomorphic.
perso.wanadoo.fr /vbm-ehr/CT/CT22.htm   (6236 words)

  
 Foster   (Site not responding. Last check: 2007-10-18)
His work on generalising Boolean rings culminated in his classic paper The theory of Boolean-like rings which he published in the Transactions of the American Mathematical Society in 1946.
Foster went on to define the concept of a primal algebra generalising a Boolean algebra within the theory of varieties of universal algebras.
He continued devoting his efforts to the structure theory of algebras that are generalizations of Boolean algebras and, more than ten years down the line in 1966, he published Families of algebras with unique (sub-)direct factorization.
www-gap.dcs.st-and.ac.uk /~history/Mathematicians/Foster.html   (1238 words)

  
 bpi   (Site not responding. Last check: 2007-10-18)
British Phonographic Industry is a record industry trade association.
In mathematics, the Boolean prime ideal theorem is a (strictly weaker) consequence of the axiom of choice.
This is a disambiguation page; that is, one that points to other pages that might otherwise have the same name.
www.yourencyclopedia.net /bpi.html   (159 words)

  
 ACO - Typical Program of Study   (Site not responding. Last check: 2007-10-18)
The max-flow min-cut theorem and the associated algorithm, Hoffman's circulation theorem, Hu's 2-commodity flow theorem
Max-flow Min-cut theorem, Menger's theorem, the structure of 1-, 2-, 3- connected graphs (blocks, ear-decomposition, contractible edges, Tutte's synthesis of 3-connected graphs)
Ramsey's theorem for graphs, upper and lower bounds, Ramsey's theorem for k-tuples
www.math.gatech.edu /~acoweb/syllabi.html   (488 words)

  
 [No title]
The Prime Ideals of the Boolean Ring of Intervals.
A Theorem Equivalent to the Fundamental Theorem of Algebra.
A Theorem Equivalent to Picard's Little Theorem and a Derivation of the Fundamental Theorem of Algebra (with P.
www.math.ucdavis.edu /~suh/abian/abian-list.html   (2121 words)

  
 [No title]
We define Ohkawa classes and prove Ohkawa's theorem (Theorem 1.2) in the Section 1; to prove the result,@we show that there is a set O of Ohkawa classes, of cardinality at most 22, and0that this set maps onto the collection of Bous* *field classes.
Given a left ideal I in F based at a finite spectrum A, we write dom(I) for A* *, the domain of the maps in I. For any finite A, we let (1)A denote the ideal consist* *ing of every map with domain A. Lemma 2.1.
Note that each X(S) constructed in the proof of Theorem 3.1 is Bousfield equi* *v- alent to the sphere, so this result gives little insight into the cardinality o* *f the set of Bousfield classes.
hopf.math.purdue.edu /Dwyer-Palmieri/ohkawas-theorem.txt   (2065 words)

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