Introduction
One of the biggest obstacles to using mathematical expressions on the web is
that the user currently needs to worry about layout. Web users should not
have to learn a layout engine.
The class is built as a recursive parser. It is pretty easy to add
operations to the parser, but it will not scale to a huge set of operations.
That is OK, we want to keep things simple. At some point a layout engine
may be required for a complexity level. This is not a layout engine.
Currently, only graphical output is generated, but it is hoped that MathML
output can be generated automatically if the browser supports it instead of
the graphic.
Demo:
Source:
Source is available.
Functions:
f(x)   function of x 
f'(x)   derivative of x 
f"(x)   second derivative of x 
sqrt x   Square root of x 
root y x   yth root of x 
int _ _ x   integral of x 
int 1 3 x   integral from 1 to 3 of x 
sum _ _ x   summation of x 
sum 1 n x   summation from 1 to n of x 
x ^ y   x raised to the yth power 
x * y   x times y 
bar x   x bar 
hat x   x hat 
x . y   x times y 
x / y   x divided by y 
x + y   x plus y 
x  y   x minus y 
x_y   x sub y 
forall x   for all x 
exists x   there exists an x 
backepsilon   back epsilon 
therefore   therefore 
x ortho y   x is orthogonal to y 
x le y   x is less than or equal to y 
x <= y   x is less than or equal to y 
x =< y   x is less than or equal to y 
inf   infinity 
infinity   infinity 
leftright   left right arrow 
left   left arrow 
up   up arrow 
right   right arrow 
down   down arrow 
pm   plus or minus 
+   plus or minus 
x ge y   x is greater than or equal to y 
x >= y   x is greater than or equal to y 
x => y   x is greater than or equal to y 
x times y   x times y 
x cross y   x cross y 
x prop y   x is proportional to y 
partial / {partial x}   derivative with respect to x 
x dot y   x dot y 
x divide y   x divided by y 
x div y   x divided by y 
x ne y   x not equal to y 
x <> y   x not equal to y 
x congr y   x is congruent to y 
x approx y   x is approximately y 
aleph   Aleph 
im   imaginary number 
real   real number 
wp   p function (wp), Weierstrass p 
x otimes y   x otimes y 
x oplus y   x oplus y 
null   null or empty set 
empty   null or empty set 
x intersect y   x intersection y 
x union y   x union y 
x supset y   x is a superset of y 
x supseteq y   x is a proper superset of y 
x notsubset y   x is not a subset of y 
x propsubset y   x is a proper subset of y 
x subset y   x is a subset of y 
x element y   x is an element of y 
x in y   x is in y 
x notelement y   x is not an element of y 
x notin y   x is not in y 
angle x   the angle x 
nabla   nabla 
not x   not x 
x and y   x and y 
x or y   x or y 
x equiv y   x is logically equivalent to y 
doubleleftright   double left right arrow 
doubleleft   double left arrow 
doubleup   double up arrow 
doubleright   double right arrow 
x implies y   x implies y 
doubledown   double down arrow 
(x over y)   x choose y 
Parenthesis:
visible ()
invisible {}
Greek letters:
alpha is lowercase, Alpha is uppercase.
If you want to send actual email, think about this: My name is david and my domain is eder.us.
