نتایج جستجو برای: i orders
تعداد نتایج: 1090022 فیلتر نتایج به سال:
The Hojdek Formation in the Kale-shur area consists of alternation of fine quartz arenitic-arkosic sandstones with dark gray to green shales and coal seams. This formation includes relatively well-preserved plant macrofossils which are studied here for the first time. 15 species of 9 genera belong to different orders such as Equisetales, Filicales, Sycadales and Pinales have been determined in ...
By considering the notion of MV-algebras, we recall some results on enumeration of MV-algebras and wecarry out a study on characterization of MV-algebras of orders $2$, $3$, $4$, $5$, $6$ and $7$. We obtain that there is one non-isomorphic MV-algebra of orders $2$, $3$, $5$ and $7$ and two non-isomorphic MV-algebras of orders $4$ and $6$.
In this paper we introduce a new class of partially ordered sets, called tree-visibility orders, extending the class of interval orders in a fashion similar to the extension of interval graphs to chordal graphs. This class contains interval orders, duals of generalized interval orders and height one orders. We give a characterization of tree-visibility orders by an innnite family of minimal for...
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