{"product_id":"the-calculus-von-milan-tasic-d","title":"The ¿-Calculus","description":"\u003cp\u003eThe \"¿-calculus\" is a formal logical system, which as classical one, treats (true and false) assertions in the grounds, but unlike - in the semantic sense - their truth (falsity) values are differently set. Besides, here are of interest only (always) false formulas or negations etc.  We formulate a number of formal theorems of the calculus within its \"propositional\", \"predicate\" and \"arithmetical\" versions and put forward the (meta-theoretical) requirements for completeness and consistency of these systems. It is shown that they largely \"share fate\" of classical formalizations: when it is about, say, completeness of the propositional calculus, or the (in)completeness of predicate calculus and formal number theory et al.  Finally, we bring a version of this formalism as a sequential calculus, as well as a constructive proof of its consistency (after Gentzen).\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783639664904\"\u003e\u003ch3\u003e\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Softcover - 9783639664904","offer_id":39466995417181,"sku":"9783639664904","price":44.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/b571561c-e0b3-49d2-8f60-334bb21aa5cd.jpg?v=1773380778","url":"https:\/\/shop.autorenwelt.de\/en\/products\/the-calculus-von-milan-tasic-d","provider":"Autorenwelt Shop","version":"1.0","type":"link"}