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Leibniz's Infinitesimals: Their Fictionality, Their Modern Implementations, And Their Foes From Berkeley To Russell And Beyond
Berkeley continuum infinitesimal law of continuity law of homogeneity Leibniz Robinson Stevin
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2012/5/9
Many historians of the calculus deny significant continuity between infinitesimal calculus of the 17th century and 20th century developments such as Robinson's theory. Robinson's hyperreals, while pro...
Chemical abundance analysis of the Open Clusters Berkeley 32, NGC 752, Hyades and Praesepe
Stars: abundances – Galaxy: disc – Galaxy: open clusters and associations: individual: NGC 752 Hyades Berkeley 32 Preasepe (M 44)
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2011/10/8
Context. Open clusters are ideal test particles to study the chemical evolution of the Galactic disc. However the existing high-resolution abundance determinations, not only of [Fe/H], but also of oth...
Old open clusters and the Galactic metallicity gradient: Berkeley 20, Berkeley 66, and Tombaugh 2
Galaxy disc – Hertzsprung-Russell (HR) diagram – open clusters and associations
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2010/11/15
To study the crucial range of Galactocentric distances between 12 and 16 kpc, where little
information is available, we have obtained V I CCD imaging of Berkeley 20 and BV I CCD
imaging of Berkeley ...