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Van der Pol was concerned with obtaining approximate solutions for equations of the type ¨ + ˙ + =, where (, ˙,) = ˙ following the previous notation. This system is often called the Van der Pol oscillator. Applying periodic averaging to this nonlinear oscillator provides qualitative knowledge of the phase space without solving the system ...
Van der Waerden's theorem is a theorem in the branch of mathematics called Ramsey theory.Van der Waerden's theorem states that for any given positive integers r and k, there is some number N such that if the integers {1, 2, ..., N} are colored, each with one of r different colors, then there are at least k integers in arithmetic progression whose elements are of the same color.
Eduard van der Elsken (10 March 1925 – 28 December 1990) was a Dutch photographer and filmmaker.. His imagery provides quotidian, intimate and autobiographic perspectives on the European zeitgeist [1] spanning the period of the Second World War into the 1970s in the realms of love, sex, art, music (particularly jazz), and alternative culture.
Sippar-Amnanum (also Sippar-Annunitum, Sippar-rabum, Sippar-durum, and Sippar-Anunit ), modern Tell ed-Der (also Teil ed-Der) in Baghdad Governorate, Iraq, was an ancient Near Eastern city about 70 kilometers north of Babylon, 6 kilometers northeast of Sippar and about 26 kilometers southwest of modern Baghdad. Occupation dates back to the days ...
The Tennessee Titans interviewed four more candidates Saturday in their search for a new general manager. Tennessee virtually interviewed Colts assistant general manager Ed Dodds, Seattle senior ...
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Willibrordus Martinus Pancratius van der Aalst (born 29 January 1966) is a Dutch computer scientist and full professor at RWTH Aachen University, leading the Process and Data Science (PADS) group. His research and teaching interests include information systems , workflow management , Petri nets , process mining , specification languages , and ...
The leader of a Japanese crime syndicate who was charged by U.S. authorities with trafficking nuclear materials from Myanmar pleaded guilty on Wednesday, the U.S. Justice Department said in a ...