Recent content by Larne

Not a stupid question at all! Around 1843 the famous mathematician, Sir William Rowan Hamilton, was wondering exactly the same thing. Eventually he realized that it is impossible to extend the complex numbers into three dimensions in a consistent way... but that it is possible in four...

Compound expressions should be enclosed in curly braces: \int_{-3}^3 dx Also, as an alternate answer to your original question, if you just want a long vertical bar try \bigg| For example, \int_{-3}^3 dx = x \bigg|_{-3}^3 = 3 - (-3) = 6 (if you think \bigg| looks too big you can...

Free options Not to confuse the issue, but you might also want to look into Maxima . It may not be as powerful as Mathematica, but it's completely free and might be powerfull enough, depending on what you're doing. It can also be used with http://www.texmacs.org/index.php3 , which provides a...