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A scientific case for XMM-Newton continuation

✍ Scribed by B. McBreen; N. Schartel


Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
47 KB
Volume
329
Category
Article
ISSN
0004-6337

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✦ Synopsis


Abstract

The presentations made at the workshop “XMM‐Newton: The Next Decade”, held at ESAC from 4th to the 6th of July 2007, contained an overwhelming amount of new results and well justified scientific questions that can be addressed by observations with XMM‐Newton. XMM‐Newton has over the next decade a solid scientific case. Given the high impact of X‐ray observations, XMM‐Newton operations are not only a matter for “X‐ray astrophysics”, but also of fundamental importance for astrophysics in general. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)


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Discrete versus continuous Newton's meth
✍ Dietmar Saupe 📂 Article 📅 1988 🏛 Springer Netherlands 🌐 English ⚖ 796 KB

We consider the damped Newton's method Nh(z)= z-hp(z)/p'(z), 0 < h < 1 for polynomials p(z) with complex coefficients. For the usual Newton's method (h = 1) and polynomials p(z), it is known that the method may fail to converge to a root of p and rather leads to an attractive periodic cycle. Nh(z) m