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LICS
1989
IEEE
13 years 9 months ago
1989
IEEE
A refutation mechanism is introduced into logic programming, dual to the usual proof mechanism; then negation is treated via refutation. A four-valued logic is appropriate for the...
LICS
1989
IEEE
13 years 9 months ago
1989
IEEE
We describe Elf, a metalanguage for proof manipulation environments that are independent of any particular logical system. Elf is intended for meta-programs such as theorem prover...