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  • curprev 19:45, 24 December 2017‎ Richard Pinch talk contribs‎ 835 bytes +835‎ Created page with "==Definition and existence== The presentation in this article seems odd. We start with a $\mathbf{Z}$-module with a symplectic form $\psi$ and then assume (explicitly) that t..."
How to Cite This Entry:
Arf-invariant. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Arf-invariant&oldid=42587
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