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The (2,3,7) hyperbolic triangle group is a subgroup of the group of norm 1 elements in the quaternion algebra generated as an associative algebra by the pair of generators i, j and relations i2 = j2 = η, ij = − ji. One chooses a suitable Hurwitz quaternion order in the quaternion algebra. Here the order is generated by elements.
Alexandru Papiu Ilarian National College. Coordinates: 46°32′45″N 24°34′06″E. Alexandru Papiu Ilarian National College. Alexandru Papiu Ilarian National College ( Romanian: Colegiul Național „Alexandru Papiu Ilarian”) is a high school located at 12 Bernády György Square, Târgu Mureș, Romania.
WorldCat. WorldCat is a union catalog that itemizes the collections of tens of thousands of institutions (mostly libraries ), in many countries, that are current or past members of the OCLC global cooperative. [ 3] It is operated by OCLC, Inc. [ 4] Many of the OCLC member libraries collectively maintain WorldCat's database, the world's largest ...
[6] [7] In 2017 the ACS released SciFinder-n as a web-only product with the same data content and improved user interface and search functions. [ 8 ] SciFinder is considered as the best source of chemical information worldwide, with substantially larger number of relevant information sources than Web of Science or Scopus with Reaxys . [ 9 ]
The song pokes fun at the disorder and shortages of equipment, supplies and effective leadership that the Home Guard experienced during the Second World War. The dog in Three Men in a Boat, an 1889 work by Jerome K. Jerome, is named Montmorency, the surname of the colonel in the song. The subject of the song, the Bren light machine gun, was in ...
History of PDF. The Portable Document Format (PDF) was created by Adobe Systems, introduced at the Windows and OS/2 Conference in January 1993 and remained a proprietary format until it was released as an open standard in 2008. Since then, it has been under the control of an International Organization for Standardization (ISO) committee of ...
Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. . Released in beta in November 2004, the Google Scholar index includes peer-reviewed online academic journals and books, conference papers, theses and dissertations, preprints, abstracts, technical reports, and other ...
The symmetry group of the tiling is the (2,3,7) triangle group, and a fundamental domain for this action is the (2,3,7) Schwarz triangle.This is the smallest hyperbolic Schwarz triangle, and thus, by the proof of Hurwitz's automorphisms theorem, the tiling is the universal tiling that covers all Hurwitz surfaces (the Riemann surfaces with maximal symmetry group), giving them a tiling by ...