نتایج جستجو برای: ordered structure
تعداد نتایج: 1606795 فیلتر نتایج به سال:
We generalize the matroid intersection theorem to distributive supermatroids, a structure that extends the matroid to the partially ordered ground set. Distributive supermatroids are special cases of both supermatroids and greedoids, and they generalize polymatroids. This is the first good characterization proved for the intersection problem of an independence system where the ground set is par...
The effect of lattice structure on the transport of energetic (MeV) electrons in solids irradiated by ultraintense laser pulses is investigated using various allotropes of carbon. We observe smooth electron transport in diamond, whereas beam filamentation is observed with less ordered forms of carbon. The highly ordered lattice structure of diamond is shown to result in a transient state of war...
A method for determining consensus of hierarchical incomplete ordered partitions and coverings of sets is presented in this chapter. Incomplete ordered partitions and coverings are often used in expert information analysis. These structures should be useful when an expert has to classify elements of a set into given classes, but referring to several elements he does not know to which classes th...
Expressibility at the machine level versus structure level: ESO universal Horn Logic and the class P
Consider decision problems derived from optimization problems. For problems in this category, we show that they cannot be expressed in existential second order (ESO) logic with a first order part that is universal Horn (or simply, ESO Π1 Horn) at the structure level, as opposed to machine level. This is true even when we consider ordered structures. We show that an NP-complete problem (Maximum ...
in this paper, a concept of generalized weakly contraction mappings in partially ordered fuzzy metric spaces is introduced and coincidence point theorems on partially ordered fuzzy metric spaces are proved. also, as the corollary of these theorems, some common fixed point theorems on partially ordered fuzzy metric spaces are presented.
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