Iskanje po katalogu digitalne knjižnice

Ključne besede: matematika, asociativni kolobarji, ničelni produkti, prakolobarji, idempotenti, odvajanja, aditivne preslikave, mathematics, associative rings, ring isomorphisms, prime rings, idempotents, zero products, additive maps, additive maps
Objavljeno v DKUM: 10.07.2015; Ogledov: 1040; Prenosov: 34
Povezava na celotno besedilo

Opis: Cartesian products of complete graphs are known as Hamming graphs. Using embeddings into Cartesian products of quotient graphs we characterize subgraphs, induced subgraphs, and isometric subgraphs of Hamming graphs. For instance, a graph ▫$G$▫ is an induced subgraph of a Hamming graph if and only if there exist a labeling ▫$E(G)$▫ fulfilling the following two conditions: (i) incident edges receive the same label if and only if they lie on a common triangle; (ii) for any vertices ▫$u$▫ and ▫$v$▫ at distance at least two, there exist two labels such that they appear on any induced ▫$u,v$▫-path.
Ključne besede: matematika, teorija grafov, Hammingovi grafi, inducirani podgrafi, izometrični podgrafi, kartezični produkt grafov, označevanje povezav, kvocientni grafi, mathematics, graph theory, Hamming graphs, induced subgraphs, isometric subgraphs, edge-labelings, Cartesian products, quotient graphs
Objavljeno v DKUM: 10.07.2015; Ogledov: 1169; Prenosov: 78
Povezava na celotno besedilo

Opis: Cartesian graph bundles is a class of graphs that is a generalization of the Cartesian graph products. Let ▫$G$▫ be a ▫$k_G$▫-connected graph and ▫${mathcal{D}}_c(G)$▫ denote the diameter of ▫$G$▫ after deleting any of its ▫$c < k_G$▫ vertices. We prove that if ▫$G_1, G_2, dots, G_q$▫ are ▫$k_1$▫-connected, ▫$k_2$▫-connected,...,▫$k_q$▫-connected graphs and ▫$0 leq a_1 < k_1$▫, ▫$0 leq a_2 < k_2$▫,...,▫$0 leq a_q < k_q$▫ and ▫$a = a_1 + a_2 + dots + a_q + (q-1)$▫, then the fault diameter of ▫$G$▫, a Cartesian product of ▫$G_1$▫, ▫$G_2$▫,...,▫$G_q$▫, with ▫$a$▫ faulty nodes is ▫${mathcal{D}}_{a}(G) leq {mathcal{D}}_{a_1}(G_1)+{mathcal{D}}_{a_2}(G_2) + dots + {mathcal{D}}_{a_q}(G_q) + 1$▫. We also show that ▫${mathcal{D}}_{a+b+1}(G) leq {mathcal{D}}_a(F) + {mathcal{D}}_b(B) + 1$▫ if ▫$G$▫ is a graph bundle with fibre ▫$F$▫ over base ▫$B$▫, ▫$a leq k_F$▫, and ▫$b leq k_B$▫. As an auxiliary result we prove that connectivity of graph bundle ▫$G$▫ is at least ▫$k_F+k_B$▫.
Ključne besede: mathematics, graph theory, Cartesian graph bundles, Cartesian graph products, fault diameter, interconnection network
Objavljeno v DKUM: 10.07.2015; Ogledov: 1162; Prenosov: 32
Povezava na celotno besedilo

Opis: The Subprime crisis that occurred in 2007-2008, was the most disturbing and severe crisis since The Great Depression. The global stock market indexes and housing prices noted a sharp drop. Big corporations, conglomerates, defaulted, were acquired and bailed out, since they could not meet their financing obligations. Substantial number of people lost their jobs worldwide and a lot of sectors in the economy were struggling. Within this Bachelor seminar paper, it is presented how the credit rating agencies influenced the credit crunch. The main issue discussed in this seminar work is the role of the rating agencies in one of the greatest crushes in history. They (the agencies), actually, participated in creating the structured financial products, which during the housing bubble were increasingly trading. These structured financial products were very complex and highly risky and maybe, the most crucial cause of the crisis. First, in the seminar paper it is described how the agencies work and their origins. As in the last century, Standard and Poor’s and Moody’s, emerged to great power in the financial system with assigning ratings to issuers of debt. This position in the financial world that the agencies held, has brought many academicians to doubting the possible moral hazard problems within the credit ratings business. Furthermore, it is explained how the financial turmoil emerged and the trends that preceded the credit crunch. Questions regarding the role of the agencies in the securitization process are discussed. For instance, were the rating agencies biased; were the ratings on the structured financial products inflated and if so, what were the incentives for it? Several theories and empirical evidence has been put forward concerning the importance of the ratings in the securitization process. It is concluded in this paper, that the ratings assigned to the financial derivatives were inflated and the agencies noted increased returns from it, which presents the incentives of the agencies during the housing bubble. These empirical findings also indicate of moral hazard problem within the ratings system.
Ključne besede: Credit rating agencies, Financial crisis, Structured financial products, Securitization, Inflated ratings, Moral hazard
Objavljeno v DKUM: 29.11.2012; Ogledov: 1795; Prenosov: 119
Celotno besedilo (749,27 KB)

Ključne besede: enterprises, company performance, marketing, intercompany marketing, customer relationship, management, supply chain, marketing strategy, new products, services, electronic marketing, electronic commerce, planning, globalization, marketing channels, pricing, advertising, sales promotion, Internet, case study
Objavljeno v DKUM: 05.06.2012; Ogledov: 2656; Prenosov: 81
Povezava na celotno besedilo