# MathML Tests

This is my first foray into the MathML or Mathematical Markup Language...markup language.

Things will show up here from time to time documenting various tests.

### Basic overview of MathML

I am no expert. The following, however, is a good start for anyone looking to get into this.

<math> opens up a MathML statement (it might be a good idea to also include "xmlns="http://www.w3.org/1998/Math/MathML"", just because)

<mi> represents an "identifier", which can be x, y, s, r, a, etc.

<mo> represents operators such as times, divided by, plus, minus, etc.

<mn> represents numbers

<mtext> represents text. When embedded into HTML or XHTML markup can be used within this tag.

<mrow> represents rows. This can be used to simulate formulas that involve an equation over another equation, plus other useful things. MUST BE CONTAINED WITHIN FRACTION TAGS.

<msup> and <msub> represents superscripts/subscripts. THE ELEMENT YOU ARE ATTACHING IT TO MUST BE CONTAINED WITHIN THIS TAG OR ERROR OCCURS.

<mfrac> represents fractions. Rows must be contained in this for it to work properly.

<msqrt> (<mroot>) represents roots/square roots.

<mfenced> represents fences (ie parentheses, square brackets, those kinds of things) around stuff.

### Let's get started with the simplest algebraic equation ever: the Line

$y=mx+b$
But how useful is it if it's not an actual equation?

Let's say we have two points on a line, one is (1, 1), the other is (4, 8). Let's figure out the slope, which is m.

$m=\frac{{y}_{2}-{y}_{1}}{{x}_{2}-{x}_{1}}$
Which, in turn, becomes this:

$m=\frac{4-1}{8-1}$
$m=\frac{3}{7}$
And then to figure out the rest of the equation (ie the b), sub in one of the points.

$y=\frac{3}{7}x+b$
$\mathrm{(1)}=\frac{3}{7}\mathrm{(1)}+b$
$1=\frac{3}{7}+b$
$1-\frac{3}{7}=b$
$\frac{4}{7}=b$
$\text{And the final equation is:}y=\frac{3}{7}x+\frac{4}{7}$

###### This page has been validated to XHTML 1.1, MathML 2.0, and SVG 1.1 conformance.