Geodesic
A~synthesis of the resolution method and the inverse method
Zapiski Nauchnykh Seminarov POMI, Studies in constructive mathematics and mathematical logic. Part IV, Tome 20 (1971), pp. 24-35

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It is introduced a compact coding of (finite sets of) propositional formulas by means of plane configurations called diagrams. A special kind of diagrams (called closed ones) is defined by some pure combinatorial properties. It is proved that a formula is a tautology iff its diagram is closed. An inductive procedure of generation of all closed diagrams is described. This procedure combines the ideas of the resolution method [1] and the inverse method [2]. Some isomorphism between the mentioned methods is stated. 
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     author = {G. V. Davydov},
     title = {A~synthesis of the resolution method and the inverse method},
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G. V. Davydov. A~synthesis of the resolution method and the inverse method. Zapiski Nauchnykh Seminarov POMI, Studies in constructive mathematics and mathematical logic. Part IV, Tome 20 (1971), pp. 24-35. http://geodesic.mathdoc.fr/item/ZNSL_1971_20_a2/