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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. A direction is assigned to the link at a point in each component and this direction is followed all the way around each component. For each crossing one comes across while traveling in this direction, if the strand un
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. [3] Wriothesley lived in the Barbican in London, and was a citizen and draper. [4] He married Agnes Drayton of London, and they had one son, Thomas, who was born in 1505, and later became earl of Southampton ...
Also eon. age Age of Discovery Also called the Age of Exploration. The time period between approximately the late 15th century and the 17th century during which seafarers from various European polities traveled to, explored, and charted regions across the globe which had previously been unknown or unfamiliar to Europeans and, more broadly, during which previously isolated human populations ...
Definition Example word Andr Man: Android: a machine made to look like a man Anthrop Humankind Anthropology: the study of humankind (see logy) Arch Rule; govern Gynarchy: Government by a woman [see gyn] Archae Ancient; old
The word "scythe" derives from Old English siðe. [1] In Middle English and later, it was usually spelled sithe or sythe. However, in the 15th century some writers began to use the sc-spelling as they thought (wrongly) the word was related to the Latin scindere (meaning "to cut"). [2]
Magnetic helicity is proportional to the sum of the topological quantities twist and writhe for magnetic field lines. The twist is the rotation of the flux tube around its axis, and writhe is the rotation of the flux tube axis itself. Topological transformations can change twist and writhe numbers, but conserve their sum.
In the context of proofs, this phrase is often seen in induction arguments when passing from the base case to the induction step, and similarly, in the definition of sequences whose first few terms are exhibited as examples of the formula giving every term of the sequence. necessary and sufficient
For example, in the course of an afternoon, a wholesaler might receive a written inquiry about the availability of a product line, then communicate with suppliers and fabricators through work orders and purchase agreements, correspond via email to affirm shipping availability with a drayage company, write an invoice, and request proof of ...