منابع مشابه
Some geometrical properties of the oscillator group
We consider the oscillator group equipped with a biinvariant Lorentzian metric. Some geometrical properties of this space and the harmonicity properties of left-invariant vector fields on this space are determined. In some cases, all these vector fields are critical points for the energy functional restricted to vector fields. Left-invariant vector fields defining harmonic maps are...
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Motivated by existence and semicontinuity problems in multidimensional calculus of variations, a number of generalized convexity notions for functions has been introduced since the 50s of the last century. In its hierarchical order, the most important of these notions are polyconvexity, quasiconvexity and rank-one convexity. 01) However, the necessity to employ these semiconvexity notions as we...
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15 صفحه اولPhysique
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ژورنال
عنوان ژورنال: Journal of Graphic Science of Japan
سال: 1990
ISSN: 1884-6106,0387-5512
DOI: 10.5989/jsgs.24.15