Read More
Date: 20-1-2022
684
Date: 8-2-2022
877
Date: 24-1-2022
771
|
Consider a formula in prenex normal form,
If is the existential quantifier () and , ..., are all the universal quantifier variables such that , , then introduce the new function symbol and term . (If , then is a constant.) This function is called Skolem function (or Herbrand function).
Now replace all occurrences of by this term and remove . When all existential quantifiers are removed, convert into conjunctive normal form. This process, which usually termed skolemization, results in a formula in Skolemized form. The resulting formula is unsatisfiable iff the source formula is unsatisfiable. Note that if the source formula is satisfiable, it is not necessarily equivalent to the resulting formula.
Chang, C.-L. and Lee, R. C.-T. Symbolic Logic and Mechanical Theorem Proving. New York: Academic Press, 1997.Kleene, S. C. Mathematical Logic. New York: Dover, 2002.
|
|
لصحة القلب والأمعاء.. 8 أطعمة لا غنى عنها
|
|
|
|
|
حل سحري لخلايا البيروفسكايت الشمسية.. يرفع كفاءتها إلى 26%
|
|
|
|
|
جامعة الكفيل تحتفي بذكرى ولادة الإمام محمد الجواد (عليه السلام)
|
|
|