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F

formula box

$$\fbox{x=\frac{1}{2}}$$  gives

\fbox{x=\frac{1}{2}}

fraction

  • Syntax: \frac{numerator}{denominator}
  • Use font sizing commands for specific sizing if you don't want the predefined one to be taken.
  • Ex. (with predefined sizing): $$f(x,y)=\frac{2a}{x+y}$$ gives

f(x,y)=\frac{2a}{x+y}

  • Ex. (with specific sizing): $$f(x,y)=\frac{\fs{2}2a}{\fs{2}x+y}$$ gives

f(x,y)=\frac{\fs{2}2a}{\fs{2}x+y}

  • You may nest fractions as much as you want.
  • Ex. (nested fractions): $$\frac{\frac{a}{x-y}+\frac{b}{x+y}}{1+\frac{a-b}{a+b}}$$ gives

\frac{\frac{a}{x-y}+\frac{b}{x+y}}{1+\frac{a-b}{a+b}}

G

gamma (lower case greek letter)

$$\gamma$$ gives \gamma

Gamma (upper case greek letter)

$$\Gamma$$ gives \Gamma

greater than

$$x>y$$  gives

x>y

greater than or equal

$$x\ge~y$$ or $$x\geq~y$$ gives

x\ge~y

greek letters (overview)

Simply write \greekletter for lower case and \Greekletter for upper case.

Here's a list of all known greek letters (Note: not all upper case greek letters are known):

Lower Case Greek Letters:

CommandFilter ExpressionResult
\alpha$$\alpha$$\alpha
\beta$$\beta$$\beta
\gamma$$\gamma$$\gamma
\delta$$\delta$$\delta
\epsilon$$\epsilon$$\epsilon
\varepsilon$$\varepsilon$$\varepsilon
\zeta$$\zeta$$\zeta
\eta$$\eta$$\eta
\theta$$\theta$$\theta
\vartheta$$\vartheta$$\vartheta
\iota$$\iota$$\iota
\kappa$$\kappa$$\kappa
\lambda$$\lambda$$\lambda
\mu$$\mu$$\mu
\nu$$\nu$$\nu
\xi$$\xi$$\xi
o  (!)$$o$$o
\pi$$\pi$$\pi
\varpi$$\varpi$$\varpi
\rho$$\rho$$\rho
\varrho$$\varrho$$\varrho
\sigma$$\sigma$$\sigma
\varsigma$$\varsima$$\varsigma
\tau$$\tau$$\tau
\upsilon$$\upsilon$$\upsilon
\phi$$\phi$$\phi
\varphi$$\varphi$$\varphi
\chi$$\chi$$\chi
\psi$$\psi$$\psi
\omega$$\omega$$\omega

Upper Case Greek Letters:

CommandFilter ExpressionResult
\Gamma$$\Gamma$$\Gamma
\Delta$$\Delta$$\Delta
\Theta$$\Theta$$\Theta
\Lambda$$\Lambda$$\Lambda
\Xi$$\Xi$$\Xi
\Pi$$\Pi$$\Pi
\Sigma$$\Sigma$$\Sigma
\Upsilon$$\Upsilon$$\Upsilon
\Phi$$\Phi$$\Phi
\Psi$$\Psi$$\Psi
\Omega$$\Omega$$\Omega

I

infinity

$$\infty$$  gives \infty

integral

  • General syntax for symbols with a kind of lower and upper limits:

\symbolname_{<em>lowerexpression</em>}^{<em>upperexpression</em>}

  • In general, there are two ways how these lower and upper expressions can be placed: centered below and above the symbol or in a subscript / superscript manner. In the first case the symbol name is preceded by the word "big", in the second there is no prefix.
  • Syntax for integral symbol:

$$\bigint_{0}^{\infty}$$   gives  

\bigint_{0}^{\infty}

and

$$\int_{0}^{\infty}$$   gives 

\int_{0}^{\infty}

  • Use font size commands for a nicer picture:

$$\LARGE\bigint_{\small0}^{\small\infty}$$   gives  

\LARGE\bigint_{\small0}^{\small\infty}

and

$$\large\int_{\small0}^{\small\infty}$$   gives 

\large\int_{\small0}^{\small\infty}

iota (lower case greek letter)

$$\iota$$ gives \iota

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