Wednesday, April 1, 2020, 7:07 AM
Site: Saint Martin's University Moodle
Course: Saint Martin's University Moodle (SMU)
Glossary: Math Notation Help
S

#### square root

• $$\sqrt{a}$$ or $$\sqrt~a$$ gives $\sqrt~a$
• Use braces for terms with more than one character: $$\sqrt{x+y}$$ gives

$\sqrt{x+y}$

#### subscript

• The command character "_" triggers subscription of the following expression(s).
• For more than one subscripted character put them in braces {...}.
• Use font sizing commands for appropriate sizing.
• Ex.:$$x_1$$ gives

$x_1$

• Ex.:$$a_{m+2n}$$ gives

$a_{m+2n}$

• Ex. (with specific sizing):  $$x_{\small1}=a_{\small{m+2n}}$$ gives

$x_{\small1}=a_{\small{m+2n}}$

• Combine subscripting with superscripting (command character "^").
Syntax: Expr_{subExpr}^{supExpr}.
• Ex.: $$A_{\small{i,j,k}}^{\small{-n+2}}$$ gives

$A_{\small{i,j,k}}^{\small{-n+2}}$

#### sum (summation)

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

\symbolname_{lowerexpression}^{upperexpression}

• 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 summation symbol:

$$\bigsum_{i=k}^{n}$$   gives

$\bigsum_{i=k}^{n}$

and

$$\sum_{i=k}^{n}$$   gives

$\sum_{i=k}^{n}$

• Use font size commands for a nicer picture:

$$\LARGE\bigsum_{\small{i=1}}^{\small{n}}$$   gives

$\LARGE\bigsum_{\small{i=1}}^{\small{n}}$

and

$$\large\sum_{\small{i=1}}^{\small{n}}$$   gives

$\large\sum_{\small{i=1}}^{\small{n}}$

#### superscript

• The command character "^" triggers superscription of the following expression(s).
• For more than one superscripted character put them in braces {...}.
• Use font sizing commands for appropriate sizing.
• Ex.: $$x^2$$ gives

$x^2$

• Ex.: $$a^{m+2n}$$ gives

$a^{m+2n}$

• Ex. (with specific sizing): $$x^{\small2}=a^{\small{m+2n}}$$ gives

$x^{\small2}=a^{\small{m+2n}}$

• Combine superscripting with subscripting (command character "_").
Syntax: Expr_{subExpr}^{supExpr}.
• Ex.: $$A_{\small{i,j,k}}^{\small{-n+2}}$$ gives

$A_{\small{i,j,k}}^{\small{-n+2}}$

T

#### tau (lower case greek letter)

$$\tau$$ gives $\tau$

#### TeX

$TeX$  notation allows for the expression of ASCII characters to generate formatted graphics output

#### theta (lower case greek letter)

$$\theta$$ gives $\theta$

#### Theta (upper case greek letter)

$$\Theta$$ gives $\Theta$

#### times

$$a\times~b$$ gives $a\times~b$

#### triangle

$$\triangle~abc$$ gives $\triangle~abc$