User:Richard Pinch/sandbox/Ref
From Encyclopedia of Mathematics
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Richard Pinch/sandbox/Ref. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Richard_Pinch/sandbox/Ref&oldid=30370
Richard Pinch/sandbox/Ref. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Richard_Pinch/sandbox/Ref&oldid=30370