Alexander polynomial
A surname from German.
(pharmacology) A barbiturate drug used as a sedative.
(obsolete) harmony; melodiousness
(mathematics) A knot invariant which assigns a polynomial with integer coefficients to each knot type.
複雑な結び目に対してアレクサンダー多項式を計算すると、分類に役立つ驚くべき対称性が明らかになることが多い。
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