11. Nove karakterizacije v strukturni teoriji grafov : 1-popolno usmerljivi grafi, produktni grafi in cena povezanostiTatiana Romina Hartinger, 2017, doctoral dissertation Keywords: 1-perfectly orientable graph, structural characterization of families of graphs, chordal graph, interval graph, circular arc graph, cograph, block-cactus graph, cobipartite graph, K4-minor-free graph, outerplanar graph, graph product, Cartesian product, lexicographic product, direct product, strong product, price of connectivity, cycle transversal, path transversal Published in RUP: 09.11.2017; Views: 2623; Downloads: 39 Link to full text |
12. Mappings that preserve pairs of operators with zero triple Jordan productMirko Dobovišek, Bojan Kuzma, Gorazd Lešnjak, Chi-Kwong Li, Tatjana Petek, 2007, original scientific article Abstract: Let ▫$\mathbb{F}$▫ be a field and ▫$n \ge 3$▫. Suppose ▫${\mathfrak{G_1,G_2}} \subseteq M_n(\mathbb{F})▫$ contain all rank-one idempotents. The structure of surjections ▫$\phi : \mathfrak{G_1} \to \mathfrak{G_2}$▫ satisfying ▫$ABA = 0 \iff \phi(A)\phi(B)\phi(A) = 0$▫ is determined. Similar results are also obtained for (a) subsets of bounded operators acting on a complex or real Banach space, (b) the space of Hermitian matrices acting on ▫$n$▫-dimensional vectors over a skew-field, (c) subsets of self-adjoint bounded linear operators acting on an infinite dimensional complex Hilbert space. It is then illustrated that the results can be applied to characterize mappings ▫$\phi$▫ on matrices or operators such that ▫$F(ABA) = F(\phi(A)\phi(B)\phi(A))▫$ for all ▫$A,B$▫ for functions ▫$F$▫ such as the spectral norm, Schatten ▫$p$▫-norm, numerical radius and numerical range, etc. Keywords: matrix algebra, Jordan triple product, nonlinear preservers Published in RUP: 03.04.2017; Views: 2468; Downloads: 97 Link to full text |
13. Thermally modified timber : recent developments in Europe and North AmericaDick Sandberg, Andreja Kutnar, 2016, published scientific conference contribution Keywords: okoljske deklaracije proizvodov, nizko ogljična bioekonomija, pravila kategorij proizvodov, trajnostni razvoj, environmental product declaration, low-carbon bioeconomy, product category rules, sustainability Published in RUP: 08.08.2016; Views: 4224; Downloads: 66 Link to full text |
14. On the split structure of lifted groupsAleksander Malnič, Rok Požar, 2016, original scientific article Abstract: Let ▫$\wp \colon \tilde{X} \to X$▫ be a regular covering projection of connected graphs with the group of covering transformations ▫$\rm{CT}_\wp$▫ being abelian. Assuming that a group of automorphisms ▫$G \le \rm{Aut} X$▫ lifts along $\wp$ to a group ▫$\tilde{G} \le \rm{Aut} \tilde{X}$▫, the problem whether the corresponding exact sequence ▫$\rm{id} \to \rm{CT}_\wp \to \tilde{G} \to G \to \rm{id}$▫ splits is analyzed in detail in terms of a Cayley voltage assignment that reconstructs the projection up to equivalence. In the above combinatorial setting the extension is given only implicitly: neither ▫$\tilde{G}$▫ nor the action ▫$G\to \rm{Aut} \rm{CT}_\wp$▫ nor a 2-cocycle ▫$G \times G \to \rm{CT}_\wp$▫, are given. Explicitly constructing the cover ▫$\tilde{X}$▫ together with ▫$\rm{CT}_\wp$▫ and ▫$\tilde{G}$▫ as permutation groups on ▫$\tilde{X}$▫ is time and space consuming whenever ▫$\rm{CT}_\wp$▫ is large; thus, using the implemented algorithms (for instance, HasComplement in Magma) is far from optimal. Instead, we show that the minimal required information about the action and the 2-cocycle can be effectively decoded directly from voltages (without explicitly constructing the cover and the lifted group); one could then use the standard method by reducing the problem to solving a linear system of equations over the integers. However, along these lines we here take a slightly different approach which even does not require any knowledge of cohomology. Time and space complexity are formally analyzed whenever ▫$\rm{CT}_\wp$▫ is elementary abelian. Keywords: algorithm, abelian cover, Cayley voltages, covering projection, graph, group extension, group presentation, lifting automorphisms, linear systems over the integers, semidirect product Published in RUP: 15.10.2015; Views: 2782; Downloads: 157 Full text (422,56 KB) |
15. What drives eco-innovations in SloveniaJana Hojnik, Mitja Ruzzier, Boštjan Antončič, Matej Rus, 2015, published scientific conference contribution abstract Keywords: produktne eko-inovacije, procesne eko-inovacije, organizacijske eko-inovacije, določljivke, Slovenija, product eco-innovation, process eco-innovation, organizational eco-innovation, determinants, Slovenia Published in RUP: 14.10.2015; Views: 3443; Downloads: 77 Link to full text |
16. The development and management of visitor attractionsJohn Swarbrooke, 2000, higher education textbook Abstract: #The #development and management of visitor attractions Keywords: turizem, turistični proizvod, management, vodenje, prihodnost, kultura, muzeji, narava, naravna bogastva, znamenitosti, zabava, zabavna industrija, nakup, gostinstvo, marketing, trženje, strategija, strategija trženja, kvaliteta, uporaba človeških zmogljivosti, učbeniki, primeri, case study, Velika Britanija, tourism, tourist product, management, leadership, future, culture, museums, nature, natural resources, remarkableness, sight-seeing, entertainment, entertainment industry, shopping, catering, marketing, strategy, marketing strategy, quality, human resource management, textbooks, cases, case study, Great Britain Published in RUP: 10.07.2015; Views: 4286; Downloads: 126 Link to full text |
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