منابع مشابه
Use of a Mariotte bottle for the experimental study of the transition from laminar to turbulent flow
A Mariotte bottle is a device that provides a constant effusion velocity for liquids. We discuss a Mariotte bottle that has been designed to study the flow regime and the transition from laminar to turbulent flow. Several straight, smooth, circular glass tubes with different lengths and sections were inserted into the lower part of the bottle so that the rate of flow could be measured in very d...
متن کاملsurvey on the rule of the due & hindering relying on the sheikh ansaris ideas
قاعده مقتضی و مانع در متون فقهی کم و بیش مستند احکام قرار گرفته و مورد مناقشه فقهاء و اصولیین می باشد و مشهور معتقند مقتضی و مانع، قاعده نیست بلکه یکی از مسائل ذیل استصحاب است لذا نگارنده بر آن شد تا پیرامون این قاعده پژوهش جامعی انجام دهد. به عقیده ما مقتضی دارای حیثیت مستقلی است و هر گاه می گوییم مقتضی احراز شد یعنی با ماهیت مستقل خودش محرز گشته و قطعا اقتضاء خود را خواهد داشت مانند نکاح که ...
15 صفحه اولDrawing Disconnected Graphs on the Klein Bottle
Résumé We prove that two disjoint graphs must always be drawn separately on the Klein bottle in order to minimize the crossing number of the whole drawing.
متن کاملThe Klein Bottle: Variations on a Theme
It is a well-known fact that K is a genus 2 nonorientable closed surface with Euler characteristic χ = 0, which is topologically equivalent to a couple of Möbius bands glued together along the border, and that it is nonembeddable in R. It is possible, however, to immerse it in R, that is, to map it into R obtaining an image with no singular points. To give an immersion of K in R, it suffices to...
متن کاملFive-coloring graphs on the Klein bottle
We exhibit an explicit list of nine graphs such that a graph drawn in the Klein bottle is 5-colorable if and only if it has no subgraph isomorphic to a member of the list. 31 August 2007, revised 18 January 2012. Partially supported by NSF under Grant No. DMS-0200595. Partially supported by NSF under Grants No. DMS-0200595, DMS-0354742, and DMS-0701077. Partially supported by NSF Graduate Fello...
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ژورنال
عنوان ژورنال: Časopis pro pěstování matematiky a fysiky
سال: 1892
ISSN: 1802-114X
DOI: 10.21136/cpmf.1892.123016