منابع مشابه
APPROXIMATIONS IN H v - MODULES
In this paper we consider the relation 2! defined on an Hv-module M and we interprete the lower and upper approximations as subsets of the module M=2! and we give some results in this connection.
متن کاملOn Minimal Approximations of Modules
Let R be a ring and consider the category ModR of (right) R-modules. Given a class C ofR-modules, a morphismM → N in ModR is called a left C-approximation of M provided that N belongs to C and the induced morphism HomR(N,C) → HomR(M,C) is surjective for every C in C. This concept has been introduced by Auslander and Smalø [2], and independently by Enochs [5]. Approximations arise naturally in v...
متن کاملn-ARY Hv-MODULES WITH EXTERNAL n-ARY P -HYPEROPERATION
Hyperstructure theory was born in 1934 when Marty [19] defined hypergroups as a generalization of groups. Let H be a non-empty set and let ℘∗(H) be the set of all non-empty subsets of H. A hyperoperation on H is a map ◦ : H ×H −→ ℘∗(H) and the couple (H, ◦) is called a hypergroupoid. If A and B are non-empty subsets of H, then we denote A◦B = ∪ a∈A, b∈B a◦b, x◦A = {x}◦A and A◦x = A◦{x}. Under c...
متن کاملComplex fuzzy Hv-subgroups of an Hv-group
The concept of complex fuzzy sets is a generalization of ordinary fuzzy sets. In this paper, we introduce the concept of complex fuzzy subhypergroups ($H_{v}$-subgroups) as well as the concept of complex anti-fuzzy subhypergroups ($H_{v}$-subgroups). We investigate their properties and their relations with the traditional fuzzy (anti-fuzzy) subhypergroups ($H_{v}$-subgroups), and we prove some ...
متن کاملEclipsing binaries in the Magellanic Clouds . ⋆ uvby CCD light curves and photometric analyses for HV 982 ( LMC ) , HV 12578 ( LMC ) , HV 1433 ( SMC ) , and HV 11284 ( SMC )
Eclipsing binaries in the Magellanic Clouds. ⋆ uvby CCD light curves and photometric analyses for Abstract. We present new accurate CCD uvby light curves for the LMC eclipsing binaries HV982 and HV12578, and for the SMC systems HV1433 and HV11284 obtained at the Danish 1.5m telescope at ESO, La Silla. The light curves were derived from DoPHOT photometry, and typical accuracies are between 0.007...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Taiwanese Journal of Mathematics
سال: 2002
ISSN: 1027-5487
DOI: 10.11650/twjm/1500407473