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A008984
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Number of immersions of the oriented circle into the oriented plane with n double points and index n-1.
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6
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OFFSET
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0,3
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REFERENCES
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V. I. Arnold, Topological Invariants of Plane Curves and Caustics, American Math. Soc., 1994, p. 18.
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LINKS
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CROSSREFS
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KEYWORD
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nonn,nice,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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