Resolution method - artificial intelligence, Computer Engineering

Resolution Method - Artificial intelligence:

A minor miracle happened in 1965 when Alan Robinson published his resolution function. This function uses a generalized format of the resolution principal of inference we looked in the last lecture. It has been mathematically proven to be disclaimer - complete over first categorize logic. This proves that if you write any set of sentences in first classify logic which are disagree (i.e., taken together they are false, in that they have no models), then the resolution process will eventually derive the fake symbol, indicating that the sentences somehow contradict each other.

In particular, if the position of first order sentences comprises a position of axioms and the negation of a theorem you desire to prove, the resolution manner can be used in a proof-by-contradiction method. These means that, if your first order theorem is true then verify by contradiction using the resolution process is guaranteed to search the proof to a theorem eventually. The underlining here identifies some disadvantage to resolution theorem prove.

  • It just works for true theorems which may be articulated in first arrangement logic: it may not check at the similar time whether a conjecture is true or false, and it can't do task in senior order logics. (There are related methods which locate these troubles, to varying degree of success.)
  • While it is proven that the way will find the answer, in performance the search space is often too large to search one in a sensible total of time, even for fairly easy theorems.

Not with standing  these  disadvantage,  resolution  theorem  proving  is  a  whole process: if your theorem does follow from the axiom of a area, then changes can justify it. Moreover, it only uses single law of deduction ,rather than the  massive amount  we  looked  in  the  previous  talk.  Hence,  it  is  comparatively  simple  to

Understand how resolution theorem justify task  For these reasons, the growth of the resolution manner was a huge accomplishment in logic, with serious implication to Artificial Intelligence study.

Resolution works by having two sentences and to resolve them into single, eventually resolving two sentences to construct the false report. The resolution law is more complex than the rules of inference we've seen in past, and we have to cover some preliminary notions before we can get how it works. In particular, we have to see at conjunctive simple form and unification before we may  state the complete resolution method at the center of the resolution method.

Posted Date: 10/2/2012 8:42:47 AM | Location : United States







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