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What is double vertical bar?
A double vertical bar ⟨||⟩ or ⟨ǁ⟩ is the standard caesura mark in English literary criticism and analysis. It marks the strong break or caesura common to many forms of poetry, particularly Old English verse.
What does || U || mean in vectors?
A vector is a unit vector if it has length one. The unit vector in the direction of u is given by. u. ||u|| and the distance between u and v by.
How do you type a vertical bar notation?
You can type a straight vertical line, or “|,” on most modern keyboards dating back to some of the 1980s IBM PCs. It’s generally found above the backslash, so you can type a “|” by holding down the shift key and hitting the “” key.
What does two vertical lines mean math?
Absolute Value
Absolute Value Examples and Equations The most common way to represent the absolute value of a number or expression is to surround it with the absolute value symbol: two vertical straight lines. |–6| = 6 means “the absolute value of –6 is 6.”
What do double bars mean?
: two adjacent vertical lines or a heavy single line separating principal sections of a musical composition.
What do double bars around a vector mean?
Double bars (or sometimes even single bars) tend to denote a norm in Mathematics. Most likely, the double bars here are denoting the Euclidean norm. This is just the length of the vector. So for example, the vector (I shall write it horizontally for compactness) (1,2,3) has length ‖(1,2,3)‖=√12+22+32=√14.
Which is correct double vertical bar or single vertical bar?
The capital v gives you double bars while the lower case v in $\\lvert$ gives you single vertical bars. But it’s not clear to me what to you is the “right” height. Also, you have $\\vert$ and $\\Vert$. Since you mention using a vertical bar as a binary relation, you may want $\\mid$ which is kerned to sit midway between its neighbours.
When to use double bar notation in math?
This double bar should be treated as a binary relation, so it will be distinguishable from other usages, such as a norm. Note that number 1 is wrong in two respects: there is an unwanted space between the “D” and the left parenthesis; the two bars are too near the symbols, making for ambiguity. In MathJax use $\\lVert$ and $Vert$.
What is the meaning of a double bar line?
A double barline refers to two thin, vertical lines used to separate different sections of a musical passage. In compositions written by non-English speakers, you may note that a double bar is referred to as “doppia stanghetta / barra / linea” (Italian), “double barre de mesure / barre de séparation”…
How to make double vertical bars in MathJax?
In MathJax use $\\lVert$ and $Vert$. The capital v gives you double bars while the lower case v in $\\lvert$ gives you single vertical bars. But it’s not clear to me what to you is the “right” height. Also, you have $\\vert$ and $\\Vert$.