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V

varepsilon (special lower case greek letter)

$$\varepsilon$$ gives \varepsilon

variables

  • Variables in formulas are rendered in italic roman font face, which is a widely used convention.
  • Following this convention, constants are shown as non-italic.
  • Exp.: $$f(x)=3a+x$$ gives

f(x)=3a+x

varphi (special lower case greek letter)

$$\varphi$$ gives \varphi

varpi (special lower case greek letter)

$$\varpi$$ gives \varpi

varrho (special lower case greek letter)

$$\varrho$$ gives \varrho

varsigma (special lower greek letter)

$$\varsigma$$ gives \varsigma

vartheta (special lower case greek letter)

$$\vartheta$$ gives \vartheta

vertical line (absolute value, determinant, ...etc. symbol)

  • Syntax: \left|...\right|
  • Ex.: $$\left|b-a\right|$$ gives \left|b-a\right|
  • Ex.: $${\rm~det}\left|\begin{array}{cc}a&b\\c&d \end{array}\right|$$ gives  

{\rm~det}\left|\begin{array}{cc}a&b\\c&d \end{array}\right| 

 
("\rm~something" renders "something" in roman style)