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Searching for Simple Symmetric Venn DiagramsAhmadi Mamakani, Abdolkhalegh 24 July 2013 (has links)
An n-Venn diagram is defined as a collection of n finitely intersecting closed curves dividing the plane into 2^n distinct regions, where each region is in the interior of a unique subset of the curves. A Venn diagram is simple if at most two curves intersect at any point, and it is monotone if it has some embedding on the plane in which all curves are convex. An n-Venn diagram has n-fold rotational symmetry if a rotation of 180 degrees about a centre point in the plane leaves the diagram unchanged, up to a relabeling of the curves. It has been known that rotationally symmetric Venn diagrams could exist only if the number of curves is prime. Moreover, non-simple Venn diagrams with rotational symmetry have been proven to exist for any prime number of curves. However, the largest prime for which a simple rotationally symmetric Venn diagram was known prior to this, was 7. In this thesis, we are concerned with generating simple monotone Venn diagrams, especially those that have some type(s) of symmetry. Several representations of these diagrams are introduced and different backtracking search algorithms are provided based on these representations. Using these algorithms we show that there are 39,020 non-isomorphic simple monotone 6-Venn diagrams in total. In the case of drawing Venn diagrams on a sphere, we prove that there exists a simple symmetric n-Venn diagram, for any n >= 6, with the following set(s) of isometries : (a) a 4-fold rotational symmetry about the polar axis, together with an additional involutional symmetry about an axis through the equator, or (b) an involutional symmetry about the polar axis together with two reflectional
symmetries about orthogonal planes that intersect at the polar axis. Finally, we introduce a new type of symmetry of Venn diagrams which leads us to the discovery of the first simple rotationally symmetric Venn diagrams of 11 and 13 curves. / Graduate / 0984 / Khalegh@GMail.com
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Mobilizing The Kurds In Turkey: Newroz As A MythAydin, Delal 01 December 2005 (has links) (PDF)
This thesis analyses the role of Newroz in the process of mobilization of the Kurds with the claim of separate identity in Turkey. It is claimed that Newroz is utilized as an ideological tool in order to construct/create Kurdish cultural or national unity. This function of Newroz is examined through two theoretical perspectives which are related to each other. On the one hand, Newroz is taken as a myth which has been used in the construction of Kurdish national identity. On the other hand, Newroz is considered as a tool for counter-hegemony against the hegemonic culture to create cultural unity among the Kurds. Through this analysis, a hegemonic process over/through a myth is revealed. It is claimed that the utilization of Newroz in mobilizing the Kurds resulted in a remarkable success, which gave rise to its turning out to be an ideological battlefield between Kurdish and Turkish nationalisms.
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Tradition and politics: new year festivals in TurkeyDemirer, Yucel 22 December 2004 (has links)
No description available.
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