This work has been released into the public domain by its author, Card, G.L., Zaitsev, V.N., Lindley, P.F.. This applies worldwide. In some countries this may not be legally possible; if so: Card, G.L., Zaitsev, V.N., Lindley, P.F. grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
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