Unification algorithm, Computer Engineering

Assignment Help:

Unification Algorithm:

Here if notice for instance that to unify two sentences as we must find a substitution that makes the two sentences the same. Furthermore remember there that we write V/T to signify in which we have substituted term T for variable V as read the "/" sign as "is substituted by". So now here our purpose of this algorithm will be to produce a substitution as a set of pairs V/T for a given pair of sentences. Here notice for instance example like the output for the pair of sentences as: 

 knows(john,X) 

knows(john, mary) 

will be: {X/mary}. Whether for the two sentences above involving jack and the function should fail as there was no way to unify the sentences. 

  • Thus if notice for describe instance the algorithm we use to simplify some functions it calls internally as.

  There the function isa_variable(x) checks where x is a variable. 

  • And another function isa_compound(x) checks whether x is a compound expression:

Here if we considered for instance that either a predicate or type a function or a connective usually contains subparts. Hence the subparts of a predicate or function are the arguments. Now there subparts of a connective are the things it connects. In fact we write  args(x)  for the subparts of compound expression x. So always remember that args(x) outputs a list: as the list of subparts.


Related Discussions:- Unification algorithm

What is virtual memory, What is virtual memory? Method that automatical...

What is virtual memory? Method that automatically move program and datablocks into the physical main memory when they are needed for execution are known as virtual memory.

Explain transmission gate-based d-latch, The Transmission-Gate input is lin...

The Transmission-Gate input is linked to the D_LATCH data input (D), the control input to the Transmission-Gate is linked to the D_LATCH enable input (EN) and the Transmission-Gate

Returns the information about tasks running, Returns the information about ...

Returns the information about tasks running int info = pvm_tasks( int where, int *ntask, struct pvmtaskinfo **taskp ) struct pvmtaskinfo {  int ti_tid; int ti_pt

Define asynchronous bus, Define asynchronous bus. Asynchronous buses ar...

Define asynchronous bus. Asynchronous buses are the ones in which every item being transferred is accompanied by a control signal that shows its presence to the destination uni

Simple assembly programs, Data Transfer Two most fundamental data trans...

Data Transfer Two most fundamental data transfer instructions in 8086 microprocessor are XCHG and MOV. Let's give illustrations of the use of these instructions. Program 1:

Differentiate b/w program translation and interpretation, Differentiate bet...

Differentiate between program translation and program interpretation. The program translation model makes the execution gap through translating a program written in a program

Overflow condition in linked list, Overflow condition in linked list may ha...

Overflow condition in linked list may happen when attempting to Make a node when free space pool is empty.

Write an html program segment that contains hypertext links, Write an HTML ...

Write an HTML program segment that contains hypertext links from one document to another . HTML permits any item to be placed as a hypertext reference. Therefore a single word

Principle of locality of reference, Problem: (a) What do you understand...

Problem: (a) What do you understand by the principle of locality of reference and explain how this is exploited in cache design. (b) Consider a 32-bit microprocessor that h

Determining the error models that affect program execution, In critical com...

In critical computer applications the correctness of a delivered output and the continuity of the required service beside the speed of the used CPU are the most important measures

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd