The $\Omega $-system and the Ł-system of modal logic.
Porte, Jean
Notre Dame J. Formal Logic, Tome 20 (1979) no. 1, p. 915-920 / Harvested from Project Euclid
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Publié le : 1979-10-14
Classification:  03B45,  03B50 
@article{1093882814,
     author = {Porte, Jean},
     title = {The $\Omega $-system and the \L -system of modal logic.},
     journal = {Notre Dame J. Formal Logic},
     volume = {20},
     number = {1},
     year = {1979},
     pages = { 915-920},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1093882814}
}

Porte, Jean. The $\Omega $-system and the Ł-system of modal logic.. Notre Dame J. Formal Logic, Tome 20 (1979) no. 1, pp.  915-920. http://gdmltest.u-ga.fr/item/1093882814/