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Math Forum » Discussions » sci.math.* » sci.math.independent

Topic: PREDICATE CALCULUS 2
Replies: 23   Last Post: Nov 29, 2012 1:13 AM

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Graham Cooper

Posts: 4,045
Registered: 5/20/10
PREDICATE CALCULUS 2
Posted: Nov 25, 2012 10:36 PM
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Predicate Calculus only uses the e(member,set)
predicate to construct set theoretic formula.

I convert ALL() Quantifiers to a SUBSET OF TERM Predicate

all(X,d(..X..),p(..X..))
/\
||
\/
{X|d(..X..)} C {X|p(..X..)}

Either formula can be converted to High Order Prolog.

HOP e.g.

all( X , less(X,3) , add( X, {1,2,3,4}, 4) )
^ ^ DOMAIN SUPERSET
| |
| TERM
|
QUANTIFIER



All(X):X<3 X+{1,2,3 or 4}=5
/\
|| LOGIC FORMULA
||
\/
all( X , less(X,3) , add( X, {2,3,4}, 4) ) *HOP*
/\
||
|| SET FORMULA
\/
{ X | less(X,3) } C { X | add(X, {1,2,3,4}, 4) }
|
|
| ELEMENTS
\/
{0,1,2} C {0,1,2,3}
|
v
TRUE


Herc
--
if( if(t(S),f(R)) , if(t(R),f(S)) ).
if it's sunny then it's not raining
ergo
if it's raining then it's not sunny

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