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Dennis I. Merino 《Linear algebra and its applications》2012,436(7):1960-1968
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Let f be an analytic function in a convex domain . A well-known theorem of Ozaki states that if f is analytic in D, and is given by for , and for some real α, then f is at most p-valent in D. Ozaki's condition is a generalization of the well-known Noshiro–Warschawski univalence condition. The purpose of this paper is to provide some related sufficient conditions for functions analytic in the unit disk to be p-valent in , and to give an improvement to Ozaki's sufficient condition for p-valence when . 相似文献
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Let V be a 6-dimensional vector space over a field , let f be a nondegenerate alternating bilinear form on V and let denote the symplectic group associated with . The group has a natural action on the third exterior power of V and this action defines five families of nonzero trivectors of V. Four of these families are orbits for any choice of the field . The orbits of the fifth family are in one-to-one correspondence with the quadratic extensions of that are contained in a fixed algebraic closure of . In this paper, we divide the orbits corresponding to the separable quadratic extensions into suborbits for the action of on . 相似文献