What is writhe?

Writhe

In knot theory, the writhe is a property of an oriented link diagram. The writhe is the total number of positive crossings minus the total number of negative crossings.

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Some articles on writhe:

John Writhe - Heraldic Career
... It has been claimed that Writhe began his career as Antelope Pursuivant or Rouge Croix Pursuivant under Henry V, but this is doubtful ... Writhe officiated at Edward's funeral in April 1483 and at Richard III's coronation the following July ... Writhe was the first Garter of the College of Arms, which had been incorporated in March 1484 ...
John Writhe
... John Writhe (died 1504) was a long-serving English officer of arms ... He was probably the son of William Writhe, who represented the borough of Cricklade in the Parliament of 1450–51, and is most remembered for being the first ... Writhe is also notable for the contention that it was he who developed the system of heraldic cadency employed by English officers of arms to the present day ...
John Writhe - Personal Life
... Writhe may have lived in Red Cross Street, adjoining Barbican House in London ... After Writhe's death, his son Thomas styled him Sir John but there is no proof that he was ever knighted ... Writhe died some time during May 1504 and was buried in St Giles Cripplegate ...
John Mynne - Personal Life
... He married Catherine, a daughter of John Writhe, and is mentioned in Writhe's will ... also related to Anne Mynne, the third wife of John Writhe ...