منابع مشابه
Vestislav Apostolov and Simon Salamon
There are now many explicitly known examples of metrics with holonomy group equal to G2, the simplest of which admit an isometry group with orbits of codimension one. A metric with holonomy G2 on a smooth 7-manifold Y is characterized by a 3-form and a 4-form that are interrelated and both closed. If this structure is preserved by a circle group S acting on Y (which cannot then be compact), the...
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ژورنال
عنوان ژورنال: American Journal of Neuroradiology
سال: 2015
ISSN: 0195-6108,1936-959X
DOI: 10.3174/ajnr.a4621