Large algebraic structures inside the set of surjective functions
نویسندگان
چکیده
منابع مشابه
The algebraic structures of generalized rough set theory
Rough set theory is an important technique for knowledge discovery in databases, and its algebraic structure is part of the foundation of rough set theory. In this paper, we present the structures of the lower and upper approximations based on arbitrary binary relations. Some existing results concerning the interpretation of belief functions in rough set backgrounds are also extended. Based on ...
متن کاملthe role of task-based techniques on the acquisition of english language structures by the intermediate efl students
this study examines the effetivenss of task-based activities in helping students learn english language structures for a better communication. initially, a michigan test was administered to the two groups of 52 students majoring in english at the allameh ghotb -e- ravandi university to ensure their homogeneity. the students scores on the grammar part of this test were also regarded as their pre...
15 صفحه اولQuotient algebraic structures on the set of fuzzy numbers
Institute of Mathematics of the Czech Academy of Sciences provides access to digitized documents strictly for personal use. Each copy of any part of this document must contain these Terms of use. This document has been digitized, optimized for electronic delivery and stamped with digital signature within the project DML-CZ: The Czech Digital Mathematics Library A. M. Bica has constructed in [6]...
متن کاملOn Weaknesses of Non-surjective Round Functions
We propose a new attack on Feistel ciphers with a non-surjective round function. CAST and LOKI91 are examples of such ciphers. We extend the attack towards ciphers that use a non–uniformly distributed round function and apply the attack to CAST.
متن کاملGenerating Countable Sets of Surjective Functions
We prove that any countable set of surjective functions on an infinite set of cardinality אn with n ∈ N can be generated by at most n/2 + 9n/2 + 7 surjective functions of the same set; and there exist n/2 + 9n/2 + 7 surjective functions that cannot be generated by any smaller number of surjections. We also present several analogous results for other classical infinite transformation semigroups ...
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: Bulletin of the Belgian Mathematical Society - Simon Stevin
سال: 2011
ISSN: 1370-1444
DOI: 10.36045/bbms/1307452079