Any point P with coordinates (\(x,~y\)) on the circumference of a circle can be joined to the centre (0, 0) by a straight line that forms the hypotenuse of a right angle triangle with sides of length ...
Transactions of the American Mathematical Society, Vol. 357, No. 6 (Jun., 2005), pp. 2133-2164 (32 pages) In this paper we introduce a coupled system of kinetic equations of B.G.K. type and then study ...
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