caa a22 4500 469126736 CHVBK 20180323133152.0 cr unu---uuuuu 170328e19920701xx s 000 0 eng 10.1007/BF01794981 doi (NATIONALLICENCE)springer-10.1007/BF01794981 Kracht Marcus II. Department of Mathematics, Arnimallee 3, W-1000, Berlin 33, Federal Republic of Germany aut Even more about the lattice of tense logics [Elektronische Daten] [Marcus Kracht] The present paper is based on [11], where a number of conjectures are made concerning the structure of the lattice of normal extensions of the tense logicKt. That paper was mainly dealing with splittings of and some sublattices, and this is what I will concentrate on here as well. The main tool in analysing the splittings of will be the splitting theorem of [8]. In [11] it was conjectured that each finite subdirectly irreducible algebra splits the lattice of normal extensions ofK4t andS4t. We will show that this is not the case and that on the contrary only very few and trivial splittings of the mentioned lattices exist. Springer-Verlag, 1992 Archive for Mathematical Logic Springer-Verlag 31/4(1992-07-01), 243-257 0933-5846 31:4<243 1992 31 153 https://doi.org/10.1007/BF01794981 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01794981 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Kracht Marcus II. Department of Mathematics, Arnimallee 3, W-1000, Berlin 33, Federal Republic of Germany aut NATIONALLICENCE 773 0- Archive for Mathematical Logic Springer-Verlag 31/4(1992-07-01), 243-257 0933-5846 31:4<243 1992 31 153 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer