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Math

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Mode ($ vs. $$)

Putting text between dollar signs will activate "math mode" where you can format equations and code in TeX.


A single pair of dollar signs (e.g. $y = mx + b$) produces in-line math mode (ie able to use symbol for i.e. insert symbol $\lambda$). This is used to distinguish math from text.

Example:

Code Block
languagexml
firstline1
title$_example
linenumberstrue
By the Lemma from Section 2.3, the difference of any two solutions of the nonhomogeneous equation $L[y]=g(t)$ is a solution of the homogeneous equation $L[y]=0$.

Displays as:

Image Added


A pair of dollar signs (e.g. $$y = mx + b$$) will bump it to the next a new line and center it on the assignment page in a more prominent display, centered on the &.

ex:

Image RemovedExample:

Code Block
languagexml
firstline1
title$$_example
linenumberstrue
$$ \eqalign {
2x &= 3y \cr
2x^2 &= 3y + 2z \cr
x^3 &= 3x^{@e}
} $$

Displays as:

Notice that:

  • \

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Use those curly brackets! { } are your friend!

subscript: _

superscript: ^

Bold

$\bf{XXX}$

where XXX is what you want bolded

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  • eqalign is used for equation alignment for aligning multi-line displays at a single place
  • Each line is aligned by centering on the ampersand ("&")

  • A carriage return is inserted after every "\cr"

  • Only the code between "$$ { . . . } $$" is shown


Commonly Used TeX Markup Tools

All of the following, plus more, can be accessed on the TeX Reference Card!

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Tool CategoryItemTeX Code
Elementary Math Control Sequences

Fraction

(overline is for larger

equations)

{<numerator>\over <denominator>}

\overline{ . . . }

Square root\sqrt{<expression>}
Integral\int_{lower bound}^{upper bound} {<expression>}
Formatting Alignment and SpacingIndentation\indent{ . . . }
No Indentation\noindent{ . . . }
Alignment\eqalign{ . . . }

Horizontal Spacing

(spacing within text)

\;

\enspace

alignment: \eqaline

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Vertical Spacing of

various sizes

\smallskip

\medskip

\bigskip

indentation:

\indent

for no indentions

\noindent

To display $ is a bit tricky, since it's used to indicate math type.

$\$ monetary unit

note that to call variables (@ans1) math type (ie hugging it in $    $ ) is not needed.

Text FormattingBold font\bf{ . . . }
Superscript<variable>^{<subscript expression>}
Subscript<variable>_{<subscript expression>}
Displaying Dollar Sign$\$


Tips for Using TeX

  1. Incorrect use of curly braces can cause errors, so make sure that for each opening bracket there is a corresponding closing one (and vice versa)
  2. To call variables define in the code field,  prepend it with '@'
    Example: "@ans1" calls variable ans1
  3. Feel free to Google what you're looking for with TeX as well

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ex: square root TeX

\sqrt{expression}

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