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Finding the geodesic between two points on the Earth, the so-called inverse geodetic problem, was the focus of many mathematicians and geodesists over the course of the 18th and 19th centuries with major contributions by Clairaut, [5] Legendre, [6] Bessel, [7] and Helmert English translation of Astron. Nachr. 4, 241–254 (1825).
Almost all commercially mined diamonds were formed in the conditions of extreme heat and pressure about 150 kilometers (93 mi) below the earth's surface. Coal is formed from prehistoric plants buried much closer to the surface, and is unlikely to migrate below 3.2 kilometers (2.0 mi) through geological processes.
A distinction between an exercise and a mathematical problem was made by Alan H. Schoenfeld: [2] Students must master the relevant subject matter, and exercises are appropriate for that. But if rote exercises are the only kinds of problems that students see in their classes, we are doing the students a grave disservice. He advocated setting ...
A regular digon has both angles equal and both sides equal and is represented by Schläfli symbol {2}. It may be constructed on a sphere as a pair of 180 degree arcs connecting antipodal points, when it forms a lune. The digon is the simplest abstract polytope of rank 2. A truncated digon, t{2} is a square, {4}. An alternated digon, h{2} is a ...
Add the garlic and cook for 2 minutes more. Add chicken stock, peas, water, thyme leaves, salt and pepper. Bring to a boil, partially cover the pan and reduce heat to low and simmer for 30 minutes.
A look back at how "48 Hours" covered the 1996 Christmastime murder of JonBenét Ramsey in 2002, and what her father John Ramsey says about the unsolved Colorado case nearly 28 years later.
From September 2012 to December 2012, if you bought shares in companies when Mark Vadon joined the board, and sold them when he left, you would have a 4.3 percent return on your investment, compared to a -2.3 percent return from the S&P 500.
After an introductory chapter The Nature of Mathematics, Stewart devotes each of the following 18 chapters to an exposition of a particular problem that has given rise to new mathematics or an area of research in modern mathematics. Chapter 2 – The Price of Primality – primality tests and integer factorisation