نتایج جستجو برای: ф is an empty set
تعداد نتایج: 9242726 فیلتر نتایج به سال:
The articles [13], [4], [5], [2], [14], [3], [8], [6], [15], [9], [16], [10], [11], [12], [7], and [1] provide the notation and terminology for this paper. One can prove the following proposition (1) For all non-empty sets A, B, C and for every function f from A into B such that for every element x of A holds f(x) ∈ C holds f is a function from A into C. In the sequel A will be a non-empty set ...
the poor orientation of the restaurants toward the information technology has yet many unsolved issues in regards to the customers. one of these problems which lead the appeal list of later, and have a negative impact on the prestige of the restaurant is the case when the later does not respond on time to the customers’ needs, and which causes their dissatisfaction. this issue is really sensiti...
Let D be a non empty set, let i be a natural number, and let p be a finite sequence of elements of D. Then p i is a finite sequence of elements of D. Let D be a non empty set and let a, b be elements of D. Then 〈a,b〉 is an element of D2. Let D be a non empty set, let k, n be natural numbers, let p be an element of Dk, and let q be an element of Dn. Then pa q is an element of Dk+n. Let D be a no...
The present experimental investigation was carried out in order to explore the possible thermodynamic and interactions studies of D(+) fructose with mixed solvent of aqueous alkali metal halides at different molalities and constant temperature. Experimental values of densities and ultrasonic velocities were carried out of the ternary mixture solution D(+)fructose with aqueous NaCl ,KCl , MgCl2 ...
In this article we present several logical schemes. The scheme FraenkelA2 deals with a non empty set A , a binary functor F yielding a set, and two binary predicates P , Q , and states that: {F (s, t);s ranges over elements of A , t ranges over elements of A : P [s, t]} is a subset of A provided the following condition is satisfied: • For every element s of A and for every element t of A holds ...
in this thesis,spin dependend transport and electron transport through of ng/sg(graphene/ superconductor graphen) are studied in the junction of ng/fgt/sg. due to andreev reflection conductance increases in the presence of superconductor graphene.also, by applying a voltage gate on a superconductor, fermi level shifts and the conductance is independent of ferromagnatic substrate. also, the cond...
cml in breif cml is characterized by the proliferation of large numbers of immature wbc in the blood and bone marrow. in most of the patients , it is a clonal disorder in which all cell lines, express the philadelphia chromosome)q/22 translocation(it accounts for 20 of all leukemias and most cases occur over 25 yrs of age. the disease usually begins insidiously,but symptoms referable to anemia ...
for several years, researchers in familiarity of efl teachers with post-method and its role in second and foreign language learners’ productions have pointed out that the opportunity to plan for a task generally develops language learners’ development (ellis, 2005). it is important to mention that the critical varies in language teaching was shown is the disappearances of the concept of method ...
this thesis deals essentially (but not from all aspects) with the extension of the notion of semigroup compactification and the construction of a general theory of semitopological nonaffine (affine) transformation semigroup compactifications. it determines those compactification which are universal with respect to some algebric or topological properties. as an application of the theory, it is i...
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