منابع مشابه
The dual superconformal theory for L p , q , r manifolds
We present the superconformal gauge theory living on the world-volume of D3 branes probing the toric singularities with horizon the recently discovered Sasaki-Einstein manifolds L. Various checks of the identification are made by comparing the central charge and the R-charges of the chiral fields with the information that can be extracted from toric geometry. Fractional branes are also introduc...
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The notion of r-stackedness for simplicial polytopes was introduced by McMullen and Walkup in 1971 as a generalization of stacked polytopes. In this paper, we define the r-stackedness for triangulated homology manifolds and study their basic properties. In addition, we find a new necessary condition for face vectors of triangulated manifolds when all the vertex links are polytopal. Résumé. Géné...
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در این مقاله مدلهای سنتی کنترل موجودی (r,Q) و(R,T) به صورت یک مدل چندکالایی با دو هدف کمینهسازی هزینهها و سطح خطر و تحت محدودیتهای بودجه دردسترس، حداقل سطح عملکرد، فضای انبار و تعداد کمبود مجاز توسعه یافتهاند. تابع توزیع تقاضا نرمال بوده و تقاضا با پسافت تأمین میگردد. ابتدا مدل قطعی و سپس مدل احتمالی- فازی با پارامترهای بودجه فازی، تعداد کمبود مجاز فازی، و فضای انبار که پارامتری احتمال...
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متن کاملOn Contact Metric R-Harmonic Manifolds
In this paper we consider contact metric R-harmonic manifolds M with ξ belonging to (κ, μ)-nullity distribution. In this context we have κ ≤ 1. If κ < 1, then M is either locally isometric to the product E × S(4), or locally isometric to E(2) (the group of the rigid motions of the Euclidean 2-space). If κ = 1, then M is an Einstein-Sasakian manifold. Mathematics Subject Classification: 53C05, 5...
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ژورنال
عنوان ژورنال: Topology and its Applications
سال: 1984
ISSN: 0166-8641
DOI: 10.1016/0166-8641(84)90032-4