منابع مشابه
Representations and Cohomology: Errata etc
p. (x) l. 5, “Chapter 4” should read “Chapter 6”. p. 24–25: As it stands, the proof of Lemma 2.2.3 is wrong, because ψ is not necessarily surjective. However, if P is a finitely generated projective module, then the proof works. So at the beginning of the section, one should make the further observation that P = F ′(ΓΓ) is a finitely generated projective module. This is because among all projec...
متن کاملMagnitude systems in old star catalogues
Abstract. The current system of stellar magnitudes first introduced by Hipparchus was strictly defined by Norman Robert Pogson in 1856. He based his system on Ptolemy’s star catalogue ‘Almagest’, recorded in about 137 A.D., and defined the magnitude-intensity relationship on a logarithmic scale. Stellar magnitudes observed with the naked eye recorded in seven old star catalogues were analyzed i...
متن کاملMagnitude systems in old star catalogues
Abstract The current system of stellar magnitudes first introduced by Hipparchus was strictly defined by Norman Robert Pogson in 1856. He based his system on Ptolemy’s star catalogue ‘Almagest’, recorded in about 137 A.D., and defined the magnitude-intensity relationship on a logarithmic scale. Stellar magnitudes observed with the naked eye recorded in seven old star catalogues were analyzed in...
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The comparison of visual magnitudes of stars compiled in old materials is expected to yield informations about their long-term magnitude variations. In seven old catalogues whose philological studies were finished, the sampled stars amount to 2124 except for stars that we could not identify, double stars and known variables. Comparing seven old materials each other, the independency of catalogu...
متن کاملIntroduction etc
Bilateral and multilateral development cooperation agencies are to an increasing extent promoting and adopting a sector-wide approach (SWAp) in their development cooperation. The Swedish International Development Cooperation Agency (Sida), for example, joined their first sector-wide approach cooperation in the late 90s, and today they are involved in SWAps in countries in Africa, Asia and Latin...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 1888
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.18881180709