Logiweb(TM)

Logiweb aspects of occur* ( " , " , " ) in pyk

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The "pyk" aspect

Define pyk of occur* ( asterisk , asterisk , asterisk ) as "occur* ( "! , "! , "! )" end define

The "value" aspect

define value of occur* ( t , u , s ) as norm { t is val : { u is val : { s is val : if u atom then false else { occur ( t , u head , s ) .or. occur* ( t , u tail , s ) } } } } end define

The pyk compiler, version 0.1.9 by Klaus Grue,
GRD-2007-07-12.UTC:20:11:58.175987 = MJD-54293.TAI:20:12:31.175987 = LGT-4690987951175987e-6