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The geometric series on the real line. In mathematics, the infinite series 1 2 + 1 4 + 1 8 + 1 16 + ··· is an elementary example of a geometric series that converges absolutely. The sum of the series is 1. In summation notation, this may be expressed as. The series is related to philosophical questions considered in antiquity, particularly ...
PDFCreator. PDFCreator is an application for converting documents into Portable Document Format ( PDF) format on Microsoft Windows operating systems. It works by creating a virtual printer that prints to PDF files, and thereby allows practically any application to create PDF files by choosing to print from within the application and then ...
Swiss classification: 2/3+2/3; The UIC classification is refined to (1'B)B1' for a Mallet locomotive. A similar wheel arrangement has been used for Garratt locomotives, but it is referred to as 2-4-0+0-4-2 since both engine units can pivot. US examples. This articulated wheel arrangement was rare in North America; example was the Mallet ...
Dundee and Newtyle Railway 0-2-4. This is an unusual wheel arrangement, with the only known examples being three locomotives supplied to the 4 ft 6 in ( 1,372 mm) Dundee and Newtyle Railway by J and C Carmichael of Dundee in 1833. [1] [2] These were still in operation in 1847, but may have been scrapped in 1849 when the line was converted to ...
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2,4-Dinitrophenylhydrazine ( 2,4-DNPH or DNPH) is the organic compound C 6 H 3 (NO 2) 2 NHNH 2. DNPH is a red to orange solid. It is a substituted hydrazine. The solid is relatively sensitive to shock and friction. For this reason DNPH is usually handled as a wet powder. DNPH is a precursor to the drug Sivifene .