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An Entity of Type : yago:Science105999797, within Data Space : dbpedia-live.openlinksw.com associated with source document(s)  A ribbon Hopf algebra is a quasitriangular Hopf algebra which possess an invertible central element more commonly known as the ribbon element, such that the following conditions hold: where . Note that the element u exists for any quasitriangular Hopf algebra, and must always be central and satisfies , so that all that is required is that it have a central square root with the above properties. Here is a vector space is the multiplication map is the co-product map is the unit operator is the co-unit operator is the antipode is a universal R matrix We assume that the underlying field is

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• A ribbon Hopf algebra is a quasitriangular Hopf algebra which possess an invertible central element more commonly known as the ribbon element, such that the following conditions hold: where . Note that the element u exists for any quasitriangular Hopf algebra, and must always be central and satisfies , so that all that is required is that it have a central square root with the above properties. Here is a vector space is the multiplication map is the co-product map is the unit operator is the co-unit operator is the antipode is a universal R matrix We assume that the underlying field is
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• Ribbon Hopf algebra
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• A ribbon Hopf algebra is a quasitriangular Hopf algebra which possess an invertible central element more commonly known as the ribbon element, such that the following conditions hold: where . Note that the element u exists for any quasitriangular Hopf algebra, and must always be central and satisfies , so that all that is required is that it have a central square root with the above properties. Here is a vector space is the multiplication map is the co-product map is the unit operator is the co-unit operator is the antipode is a universal R matrix We assume that the underlying field is If is finite-dimensional, one could equivalently call it ribbon Hopf if and only if its category of (say, left) modules is ribbon; if is finite-dimensional and quasi-triangular, then it is ribbon if and only if its category of (say, left) modules is pivotal.
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