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writhe
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writhe
▪ I. writhe, n. (raɪð) Also 6–7 wrythe. [f. next. Cf. wreath n., and OHG. rida ‘tensio’.] † 1. Something twisted, wreathed, or formed into a circular shape; a twisted band; a wreath. Obs.1513 Douglas æneid v. x. 25 The writhe of gold, or chane lowpit in ringis. 1548 Udall, etc. Erasm. Par. Luke vii....
Oxford English Dictionary
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Writhe
still change its writhe. Writhe of link diagrams
In knot theory, the writhe is a property of an oriented link diagram.
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writhe
writhe/raɪð; raɪð/ v1 [I, Ip] (of sb or sb's body) twist or roll about, esp because of great pain (指某人或身体)扭动或翻滚(尤指因巨痛) the writhing coils of a snake 蛇身体扭动盘绕成的圈 The patient was writhing (about) on the bed in agony. 病人疼得在床上直打滚.2 [I, Ipr] ~ (at/under sth); ~ (with sth) suffer mental agony(because of st...
牛津英汉双解词典
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John Writhe
John Writhe (died 1504) was a long-serving English officer of arms. Writhe died some time during May 1504 and was buried in St Giles-without-Cripplegate.
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writhe definition
In knot theory, there are several competing notions of the quantity writhe.
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Conquest: Writhe
Conquest: Writhe is the second full-length album from Swedish progressive metal band Burst.
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Sum of writhe and winding number of a knot is odd In Trace's paper "On the Reidemeister moves of a classical knot", Trace defines both writhe (or framing as he calls it) and winding number of a knot and uses these def...
Each time you do a Reidemeister I move, it changes both the winding number and writhe by one, so the sum of winding number and writhe changes by $-2$, and writhe constant modulo $2$.
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Superhelix
Contrary to intuition, a topological property, the linking number, arises from the geometric properties twist and writhe according to the following relationship :
Lk= T + W,
where Lk is the linking number, W is the writhe and T is the twist of the coil.
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William Wriothesley
He was the second son of Garter King of Arms, John Writhe; the younger brother of Thomas Wriothesley; and the father of Thomas Wriothesley, 1st Earl of His name at birth was William Writhe, and he was the second son of John Writhe and his first wife, Barbara, daughter of John Castlecombe.
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John Mynne
He married Catherine, a daughter of John Writhe, and is mentioned in Writhe's will. It is probable that John Mynne was also related to Anne Mynne, the third wife of John Writhe.
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Type I and Type II Topoisomerases Type I topoisomerase changes the linking number by ±1 by changing the number of **twist** present in a DNA, breaking only one strand. Type II topoisomerase changes the linking number...
Topoisomerase I changes the linking number by changing the number of twists and Topoisomerase II changes the linking the number by changing the writhe
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Thomas Wriothesley
He was the son of Garter King of Arms, John Writhe, and he succeeded his father in this office. His name at birth was Thomas Writhe, and he was the eldest son and second of four children of John Writhe and his first wife, Barbara, daughter of John
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绞拧数
绞拧数(英语:Writhe)是纽结理论中的一个纽结不变量。指纽结在各个方向投影图的拧数的平均值。一般记作:。
对于闭合曲线,绞拧数为:
.
DNA的应用
DNA超螺旋
相关条目
环绕数
琼斯多项式
参考文献
纽结理论
纽结不变量
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Reidemeister move
The type I move is the only move that affects the writhe of the diagram. The type I' move affects neither the framing of the link nor the writhe of the overall knot diagram.
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How to count the crossing number of a knot with $5$ crossing? We know that the linking number is always an integer. But for these two diagrams, I get linking number $-5/2$ and $5/2$. What's wrong? ![enter image descri...
What you're computing could be called the "self-linking number", but it's actually called the writhe. And in fact you're computing half the writhe. Moreover you have to be careful, because the writhe is _not_ an isotopy invariant, it doesn't make sense to talk about "the writhe of a knot", only "the
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