Factbites
 Where results make sense
About us   |   Why use us?   |   Reviews   |   PR   |   Contact us  

Topic: Brazilian logic


Related Topics

In the News (Thu 9 Jul 09)

  
  Brazilian logic - Wikipedia, the free encyclopedia
Brazilian logic is the dual of intuitionistic logic, where you drop the law of excluded middle (i.e.
Intuitionistic logic is modeled by open sets in a topological space: and stands for intersection, or for union, and not for the interior of the complement.
In intuitionistic logic a slight gap (at the boundary) between A and ¬A is allowed, whereas in Brazilian logic a slight overlap is allowed.
en.wikipedia.org /wiki/Brazilian_logic   (183 words)

  
 Logic
Linear temporal logic (LTL) is a subset of...
Intuitionistic logic Intuitionistic logic, or constructivist logic, is the mathematical constructivism.
Provability logic Provability logic, or the logic of provability, is a George Boolos.
www.brainyencyclopedia.com /topics/logic.html   (1513 words)

  
 Logical conjunction - Wikipedia, the free encyclopedia
In logic and technical fields that use it, conjunction, or and, is a logical operator in logical calculi, and a rule of inference in deductive systems.
Logically, the sentence "it's raining, but the sun is shining" is equivalent to "it's raining, and the sun is shining", so logically, "but" is equivalent to "and".
On the other hand, in Brazilian logic, the logical equivalence is broken between A BUT NOT B (where "BUT NOT" is a single operator) and A AND (NOT B), which is a weaker statement.
en.wikipedia.org /wiki/Logical_conjunction   (589 words)

  
 and   (Site not responding. Last check: 2007-10-08)
In logic and technical fields that use it, conjunction, or and, is a logical operator in logical calculi.
The analogue of conjunction for a (possibly infinite) familiy of statements is universal quantification, which is part of predicate logic.
One way to resolve this problem of correspondence between symbolic logic and natural language is to observe that the first sentence (using "but"), implies the existence of a hidden but mistaken assumption, namely that the sun doesn't shine when it rains.
www.yourencyclopedia.net /And.html   (478 words)

  
 CONK! Encyclopedia: Category:Logic   (Site not responding. Last check: 2007-10-08)
More specifically, logic is the study of prescriptive systems of reasoning, that is, systems proposed as guides for how people (as well, perhaps, as other intelligent beings/machines/systems) ought to reason.
Logic says which forms of inference are valid and which are not.
Traditionally, logic is studied as a branch of philosophy, but it can also be considered a branch of mathematics and computer science.
www.conk.com /search/encyclopedia.cgi?q=Category:Logic   (171 words)

  
 Negation - Wikipedia, the free encyclopedia
It is an operation needed chiefly in logic, mathematics, and grammar.
In logic, logical negation is a unary logical operator that reverses the truth value of its operand.
Algebraically, logical negation corresponds to the complement in a Boolean algebra (for classical logic) or a Heyting algebra (for intuitionistic logic).
www.wikipedia.org /wiki/Negation   (1160 words)

  
 Brazilian logic -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-08)
In (The branch of philosophy that analyzes inference) logic, Brazilian logic is a name given by Chris Mortensen, in his book Inconsistent Mathematics, to a system R# of (Click link for more info and facts about relevance logic) relevance logic.
Brazilian logic is the dual of (Click link for more info and facts about intuitionistic logic) intuitionistic logic, where you drop the (Click link for more info and facts about law of excluded middle) law of excluded middle (i.e.
In intuitionistic logic a slight gap between A and ¬A is allowed, whereas in Brazilian logic a slight overlap is allowed.
www.absoluteastronomy.com /encyclopedia/B/Br/Brazilian_logic.htm   (204 words)

  
 NEGATION FACTS AND INFORMATION
In logic, logical negation is a unary logical_operator that reverses the truth_value of its operand.
But in classical logic, we get a further identity: ''p'' → ''q'' can be defined as ~''p'' ∨ ''q'', where ∨ is logical_disjunction.
In computer_science, as in mathematics negation, is used to prove the logic of a statement.
www.palfacts.com /negation   (1057 words)

  
 AND Article, AND Information   (Site not responding. Last check: 2007-10-08)
In logic and technical fields that use it, conjunction, orand, is a logical operator in logical calculi, and a rule of inference in deductive systems.The result of conjoining two propositions is also called their conjunction.
Logically, the sentence "it's raining, but the sun isshining" is equivalent to "it's raining, and the sun is shining", so logically, "but" is equivalent to "and".
On theother hand, in Brazilian logic, the logical equivalence is brokenbetween A BUT NOT B (where "BUT NOT" is a single operator) and A AND (NOT B), which is a weaker statement.
www.anoca.org /true/false/and.html   (532 words)

  
 The Impact of Education On Life
It is a shame that we still deny millions of Brazilians older than fifteen—especially the oldest, because of the time that they have lost—the right to spell out the names of their loved ones.
The abolition of illiteracy, the simple fact that we have a broad, general, and unrestricted literacy campaign for adults—with a deadline for literacy-for-all and not the intention of literacy-for-more—will give Brazil a shock of decency.
The older the illiterate Brazilians, the greater we are in debt to them for allowing them to go so long without knowing their flag, writing their child's name, or being included in the world of the literate.
www.zonalatina.com /Zldata343.htm   (1017 words)

  
 Brazil - Brasil - BRAZZIL - News from Brazil - Adult Illiteracy, a Challenge for Brazil - Brazilian Education - ...   (Site not responding. Last check: 2007-10-08)
It also demonstrates the failure of the Brazilian state to carry out social programs: in spite of these programs, it has not succeeded in solving the problem.
In Brazil, more than 15 million adult Brazilians do not recognize their flag because they do not know how to distinguish from any other written words the motto "order and progress" written on the flag.
Brazilian social logic dominated by economicism sees adult literacy programs as the road to increasing revenue, thereby diminishing poverty.
www.brazzil.com /2004/html/articles/feb04/p124feb04.htm   (928 words)

  
 Read about Paraconsistent logic at WorldVillage Encyclopedia. Research Paraconsistent logic and learn about ...   (Site not responding. Last check: 2007-10-08)
There are several motivations for paraconsistent logic, all of which arise out of a dissatisfaction with the consistency of classical logic.
A staunch subscriber to classical logic (or, more generally, consistent logics) might simply ignore such problems, or say that sentences like L are simply meaningless.
Graham Priest, proponent of the paraconsistent logic dialetheism, offers the example of a man who is standing in a doorway in such a way that precisely half of his molecules are in the room and half of them not.
encyclopedia.worldvillage.com /s/b/Paraconsistent_logic   (629 words)

  
 Brazilian logic - Encyclopedia.WorldSearch   (Site not responding. Last check: 2007-10-08)
Logic of Poverty: The Case of the Brazilian Northeast (Routledge direct editions)
Mathematical Logic: Proceedings of the First Brazilian Conference (Lecture Notes in Pure and Applied Mathematics ; V. Advances in Artificial Intelligence : International Joint Conference 7th Ibero-American Conference on AI 15th Brazilian Symposium on AI IBERAMIA-SBIA 2000...
Advances in Artificial Intelligence - SBIA 2004 : 17th Brazilian Symposium on Artificial Intelligence, Sao Luis, Maranhao, Brazil, September 29-October...
encyclopedia.worldsearch.com /brazilian_logic.htm   (126 words)

  
 Not For Profit   (Site not responding. Last check: 2007-10-08)
While these ideas work in both classical andintuitionistic logic, they don't work in Brazilian logic, wherecontradictions are not necessarily false.
But in classical logic, we get a further identity: p → q can bedefined as ~ p ∨ q, where ∨ is logicaldisjunction.
Algebraically, logical negation corresponds to the complement in a Boolean algebra (for classical logic) or a Heytingalgebra (for intuitionistic logic).
www.elusiveeye.com /side2463-not-for-profit.html   (625 words)

  
 [No title]
Brazilian logic sounds very bizarre at first, but in fact it's just the dual of intuitionistic logic, where you drop the rule that "A or not(A)" is true.
Intuitionistic logic is nicely modeled by open sets in a topological space: "and" is intersection, "or" is union, and "not" is the interior of the complement.
In intuitionistic logic we allow a slight gap between A and not(A); in Brazilian logic we allow a slight overlap.
math.ucr.edu /home/baez/twf_ascii/week141   (3787 words)

  
 AJL: Volume 1, 2003   (Site not responding. Last check: 2007-10-08)
The corresponding →∧ logic, related to the Meyer-Routley minimal logic B+ (without ∨), is weaker than the →∧ fragment of intuitionistic logic.
A logic is said to be paraconsistent if it does not allow everything to follow from contradictory premises.
Logics are categorized as F-logics, for those proved decidable using a filtration method, and U-logics, for those proved decidable using a direct (unfiltered) method.
www.philosophy.unimelb.edu.au /ajl/2003   (303 words)

  
 Paraconsistent logic - Enpsychlopedia   (Site not responding. Last check: 2007-10-08)
A paraconsistent logic is a logic which attempts to deal with contradictions.
There are several motivations for paraconsistent logic, all of which arise out of a dissatisfaction with the consistency of classical logic, which seems to lead to results which are counter to intuition.
In classical logic, a set of sentence, \Lambda , is said to be negation inconsistent if \Lambda \vdash P and \Lambda \vdash \neg P for some sentence P.
www.grohol.com /psypsych/Paraconsistent_logic   (714 words)

  
 Read about Brazilian logic at WorldVillage Encyclopedia. Research Brazilian logic and learn about Brazilian logic here!   (Site not responding. Last check: 2007-10-08)
In logic, Brazilian logic is a name given by
Chris Mortensen, in his book Inconsistent Mathematics, to a system R# of relevance logic.
Intuitionistic logic is modeled by open sets in a topological space: and stands for
encyclopedia.worldvillage.com /s/b/Brazilian_logic   (190 words)

  
 Brazil News 24/7 - Nothing But Brazil - Brazzil Magazine - Fresh news daily - English-language Magazine on Brazilian ...   (Site not responding. Last check: 2007-10-08)
The Brazilian government wants to reverse the total embargo imposed on Brazilian meat by four countries as a result of the focuses of hoof and mouth disease detected in the...
Brazilian Minister of Foreign Relations, Celso Amorim, lead the G-20 ministerial meeting Wednesday, November 9, in Geneva, Switzerland, when he made an evaluation of the status of agriculture-related negotiations.
The Brazilian Bar Association (OAB) decided, Monday, November 7, to create a commission to investigate facts denounced in the press concerning the country's institutional crisis, according to the...
www.brazzil.com /content/view/1679/57   (2218 words)

  
 Logical conjunction : And (logic)   (Site not responding. Last check: 2007-10-08)
terms defined : Logical conjunction : And (logic)
All is still licensed under the GNU FDL.
FEAR God, says he, and keep thou keepest his commandments work, and all thy works shall be thou shalt do everything.
www.termsdefined.net /an/and-(logic).html   (648 words)

  
 Brazilian Logic Encyclopedia Article, Definition, History, Biography   (Site not responding. Last check: 2007-10-08)
Looking For brazilian logic - Find brazilian logic and more at Lycos Search.
Find brazilian logic - Your relevant result is a click away!
Look for brazilian logic - Find brazilian logic at one of the best sites the Internet has to offer!
www.karr.net /search/encyclopedia/Brazilian_logic   (361 words)

  
 wikien.info: Main_Page   (Site not responding. Last check: 2007-10-08)
In logic, and especially in its applications to mathematics and philosophy, a counterexample is an exception to a proposed general rule, i.e., a specific instance of the falsity of a universal quantification (a "for all" statement).
Although this argument is a proof by contradiction, it doesn't rely on double negation, so it works in intuitionistic logic as well as in classical logic.
Counterexamples can exist in Brazilian logic, but the above argument must be checked to ensure that the contradiction produced actually is false in the particular case at hand.
pardus.info /index.php?title=Counterexample   (952 words)

  
 The Revealer: Threat Logic   (Site not responding. Last check: 2007-10-08)
"The logging companies work with a threat logic," she says, describing the shadowy magic in which one day a company or rancher will complain about an activist, and the next he'll be gone.
As for the mainstream press: Numerous papers are carrying the AP story, and a few are linking Sister Dorothy's murder to that of the Brazilian land activist Chico Mendes, but we haven't seen any that connect Sister Dorothy's life work for the real implementation of land reform to her Catholicism.
She said Stang worried that the farmers trying to make a living in the Amazon would be killed by men hired by loggers, ranchers or land speculators who wanted them out of the way.
www.therevealer.org /archives/main_story_001653.php   (3173 words)

  
 Brazilian logic - Encyclopedia, History, Geography and Biography   (Site not responding. Last check: 2007-10-08)
Brazilian logic - Encyclopedia, History, Geography and Biography
This page was last modified 21:55, 6 Jun 2005.
This encyclopedia, history, geography and biography article about Brazilian logic contains research on
www.arikah.net /encyclopedia/Brazilian_logic   (203 words)

  
 Atlas Conferences   (Site not responding. Last check: 2007-10-08)
During the 1940s and 1950s, Stanislaw Jaskowski and Newton da Costa independently showed that inconsistency in a logic need not be identified with triviality.
Philosophy, the foundations of mathematics, computer science, theoretical modern physics, linguistics, and the numerous branches of logic have been influenced by it.
The conference welcomes contributions in all aspects of paraconsistent logic and paraconsistency, including theoretical foundations, proof theory, model theory, algebraic aspects, historical and philosophical aspects, implementation techniques, systems development and applications.
atlas-conferences.com /cgi-bin/calendar/d/faaq21   (255 words)

  
 Amazon.co.uk: Advances in Contemporary Logic and Computer Science (Contemporary Mathematics S.): Books   (Site not responding. Last check: 2007-10-08)
This volume presents the proceedings from the Eleventh Brazilian Logic Conference on Mathematical Logic held by the Brazilian Logic Society (co-sponsored by the Centre for Logic, Epistemology and the History of Science, State University of Campinas, São Paolo) in Salvador, Bahia, Brazil.
This volume presents the proceedings from the Eleventh Brazilian Logic Conference on Mathematical Logic held by the Brazilian Logic Society (co-sponsored by the Centre for Logic, Epistemology and the History of Science, State University of Campinas, Sao Paolo) in Salvador, Bahia, Brazil.
The conference and the volume are dedicated to the memory of professor Mario Tourasse Teixeira, an educator and researcher who contributed to the formation of several generations of Brazilian logicians.
www.amazon.co.uk /exec/obidos/ASIN/0821813641   (617 words)

  
 Brazil News 24/7 - Nothing But Brazil - Brazzil Magazine - Fresh news daily - English-language Magazine on Brazilian ...   (Site not responding. Last check: 2007-10-08)
Unlike every scary film I have seen their swooping and confusion at being disturbed was not accompanied by a blood-curdling screech or a sense of menace, but their frantic motion was still enough to send me flailing, like a whirling dervish, out the door into the early morning sun.
He chewed his gums for a while deep in thought, when he spoke, it was with the slow clear voice Brazilians use to speak to foreigners like myself, 'actually', he laughed, 'we were only the first town to abolish slavery because we were all too poor to afford slaves'.
It stuck me as typical Brazilian logic and I couldn't help but smile as he shuffled off.
www.brazzil.com /content/view/6950/73   (4130 words)

  
 Daniele Mundici's Home Page (last update: March 2004)
Invited Lecture in the Conference on Algebra, logic and cybernetics, in honour of the 75-th anniversary of the birth of A.I. Kokorin.
NP and Craig's interpolation theorem, In: Proceedings Logic Colloquium '82, Studies in Logic and the Foundations of Mathematics, North-Holland, Amsterdam, 1984, pp.
Model-theoretic logics, AF C*-algebras and many-valued calculi, In: Scienza e Filosofia, Saggi in Onore di Ludovico Geymonat, Garzanti, Milano, 1985, pp.
homes.dsi.unimi.it /~mundici   (3662 words)

Try your search on: Qwika (all wikis)

Factbites
  About us   |   Why use us?   |   Reviews   |   Press   |   Contact us  
Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.