Geodesic
Normalization of terms in exact models of the logic of evidence {\sf LP}
Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 6 (2023), pp. 52-55

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A basic justification model is sharp when the evidence term constructors $\cdot, +, !$ in it mean exactly the application of modus ponens rule, the union and the verification of evidences. We construct an example of a sharp model for the logic of proofs LP and establish that in any sharp model of LP every proof term is equivalent to some proof polynomial. 
@article{VMUMM_2023_6_a7,
     author = {V. N. Krupski},
     title = {Normalization of terms in exact models of the logic of evidence {\sf {LP}}},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {52--55},
     publisher = {mathdoc},
     number = {6},
     year = {2023},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2023_6_a7/}
}
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V. N. Krupski. Normalization of terms in exact models of the logic of evidence {\sf LP}. Vestnik Moskovskogo universiteta. Matematika, mehanika, no. 6 (2023), pp. 52-55. http://geodesic.mathdoc.fr/item/VMUMM_2023_6_a7/