What is the graph of y=y(x) of:
$\sqrt {{{(x - 2)}^2} + {y^2}} + \sqrt {{{(x + 2)}^2} + {y^2}} + \sqrt {{x^2} + {{(y + 2)}^2}} = 16$
Thank very much
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from where does this problem come? – Dr. Sonnhard Graubner Sep 23 '14 at 18:59
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1http://math.stackexchange.com/questions/124333/what-are-curves-generalized-ellipses-with-more-than-two-focal-points-called-an and here: http://arxiv.org/pdf/math/0702005v1.pdf – Alan Sep 23 '14 at 20:59