Math Notation Help

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P

psi (lower case greek letter)

$$$\psi$$$ gives $$\psi$$

Psi (upper case greek letter)

$$$\Psi$$$ gives $$\Psi$$

R

relativity

$$E=mc^2$$

Keyword(s):

rho (lower case greek letter)

$$$\rho$$$ gives $$\rho$$

right only brace

Syntax: \left.{...\right} (note the dot!)
Ex.: $$$\left.{{\rm~term1\atop\rm~term2}\right}=y$$$ gives

$$\left.{{\rm~term1\atop\rm~term2}\right}=y$$

(\rm~something switches to roman style)

root

Syntax: \sqrt[n]{arg} or simply \sqrt{arg} for \sqrt[2]{arg}
Ex.: $$$\sqrt[3]{8}$$$ gives

$$\sqrt[3]{8}$$

Ex.: $$$\sqrt{-1}$$$ gives

$$\sqrt{-1}$$

Nesting of roots (and combining with fractions, ...etc.) are possible.
Ex.: $$$\sqrt[n]{\frac{x^n-y^n}{1+u^{2n}}}$$$ gives

$$\sqrt[n]{\frac{x^n-y^n}{1+u^{2n}}}$$

Ex.: $$$\sqrt[3]{-q+\sqrt{q^2+p^3}}$$$ gives

$$\sqrt[3]{-q+\sqrt{q^2+p^3}}$$

Keyword(s):

S

s.u.m

$$$\sum_{n+2}^x$$$ is $$\sum_{n+2}^x$$

Keyword(s):

sigma (lower case greek letter)

$$$\sigma$$$ gives $$\sigma$$

Sigma (upper case greek letter)

$$$\Sigma$$$ gives $$\Sigma$$

smiley

$$$~\unitlength{.6}~\picture(100){~~(50,50){\circle(99)}~ ~(20,55;50,0;2){+1$\hat\bullet}~~(50,40){\bullet}~~(50,35){\circle(50,25;34)}~ ~(50,35){\circle(50,45;34)}}$$$ is $$~\unitlength{.6}~\picture(100){~~(50,50){\circle(99)}~ ~(20,55;50,0;2){+1$\hat\bullet}~~(50,40){\bullet}~~(50,35){\circle(50,25;34)}~ ~(50,35){\circle(50,45;34)}}$$

Keyword(s):

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