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<h3>How to write mathematical formulas in your exercises.</h3>

You may embed mathematical symbols and formulas into the statement (when it

is of html format), hint and solution.

<p>

If you simply want to insert some mathematical symbols or greek letters,

you just need to type a <tt class="wims_code_words">\</tt> followed by the name of

the symbol or greek letter (if you have not used this name in your parameter

definitions). For example, <tt class="wims_code_variable">\pi</tt> gives you $m_pi,

<tt class="wims_code_variable">\le</tt> gives $m_le, <tt class="wims_code_variable">\pm</tt> gives $m_pm, <tt class="wims_code_variable">\rightarrow</tt> gives

$m_rightarrow, etc. The names of the symbols follow the standard TeX

convention. Here is a

!href target=wims_help module=help/wimsdoc.en&subject=mathfonts#mathfonts list of mathematical symbols and their names

 (replace <tt class="wims_code_words">$$m_</tt> by <tt class="wims_code_words">\</tt> in the names).

<p>

More generally, to insert a whole mathematical formula, you

can type the formula in the usual way as if you enter it into any

mathematical software or any computational tool under WIMS. In order to make

the formula formatted and shown beautifully, you have

only to enclose it in a pair of parentheses preceded by a backslash \. For

example, <tt class="wims_code_words">\(x^3-3x+cos(2pi*x)^5)</tt> gives you

!insmath x^3-3*x+cos(2pi*x)^5

, or <tt class="wims_code_words">\(sqrt(x^2+y^2))</tt> gives you

!insmath sqrt(x^2+y^2)

. You can type <tt class="wims_code_words">\(integrate(x^2+1)dx)</tt> for

!insmath integrate(x^2+1)*dx

, or <tt class="wims_code_words">\(integrate(exp(x^2+1),x=1..infinity))</tt> for

!insmath integrate(exp(x^2+1),x=1..infinity)

. You can also write the sum

!insmath sum(1/n^2,n=1..infinity)

 using <tt class="wims_code_words">\(sum(1/n^2,n=1..infinity)</tt>, or the product

!insmath product(n/(n+1),n=1..infinity)

 using <tt class="wims_code_words">\(product(n/(n+1),n=1..infinity)</tt>.

<p>

More helps on how to enter mathematical expressions are in

!href target=wims_help module=help/main&chapter=1&open=1_math#math this page

.

<p>

To show a matrix

!insmath [1,2,3;4,5,6;7,8,9]

, you should type <tt class="wims_code_words">\([1,2,3;4,5,6;7,8,9])</tt>. Nested matrices are

accepted (and will be rendered correctly).

<p>

For experts in TeX or LaTeX, please notice that whenever the software sees a formula

enclosed in a pair of parentheses preceded by <tt class="wims_code_words">\</tt> which contains

backslashes, it will interpret it as a TeX source, and will directly try to

format it by TeX. This will allow you to write very sophisticated formulas if

you know how to write them in the TeX way.

TeX ou LaTeX, you can write inside the parentheses <tt class="wims_code_words">\displaystyle</tt> or

an empty pair of braces <tt class="wims_code_words">{}</tt>.

For example, you will get  

!insmath \displaystyle a

&nbsp;  &nbsp; via <tt class="wims_code_words">\(\displaystyle a )</tt>

or <tt class="wims_code_words">\({} a )</tt>

and  

!insmath a

&nbsp;  &nbsp; via <tt class="wims_code_words">\( a )</tt>.

<p>

And the most complete way to use TeX in your exercise is to choose

!href cmd=help&special_parm=format TeX format

 (for the statement only).