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Unknotting number

Unknotting number

Minimum number of times a specific knot must be passed through itself to become untied.

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  1. Unknotting problem

    Determining whether a knot is the unknot.

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  2. Crossing number (knot theory)

    Integer-valued knot invariant; least number of crossings in a knot diagram.

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  3. Prime knot

    Non-trivial knot which cannot be written as the knot sum of two non-trivial knots.

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  4. Twist knot

    Family of mathematical knots.

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Readers come from

Share of the 96 readers arriving from another article

  1. Unknot

    Loop seen as a trivial knot.

    66%

  2. Crossing number (knot theory)

    Integer-valued knot invariant; least number of crossings in a knot diagram.

    19%

  3. Unknotting problem

    Determining whether a knot is the unknot.

    16%