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formation and evolution of regional organizations: the case study of the economic cooperation organization (eco)
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The many peculiarities of Ap stars (not only chemical ones , but also magnetic field and slow rotation) may vary during the main-sequence evolution of these stars. We review here briefly the evidences found in the last thirty years for such evolution , with an emphasis on the more recent research. The position in the HR diagram of low mass Ap stars with a significant surface magnetic field (as ...
متن کاملThe resultant of an unmixed bivariate system
This paper gives an explicit method for computing the resultant of any sparse unmixed bivariate system with given support. We construct square matrices whose determinant is exactly the resultant. The matrices constructed are of hybrid Sylvester and Bézout type. The results extend those in [14] by giving a complete combinatorial description of the matrix. Previous work by D’Andrea [5] gave pure ...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1956
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/116.1.25