User:Joe

Contact Info

 * post on my discussion page.(probably the best method)
 * joe at proofwiki.org ([mailto:joe@proofwiki.org mailto])
 * webmaster at proofwiki.org ([mailto:webmaster@proofwiki.org mailto] for site related things)

Things I'm Currently Working On

 * Template:begin-equation
 * Template:equation
 * Template:end-equation
 * Template:mathematician
 * Mediawiki:Edittools

ProofWiki Links

 * Uncategorized Pages
 * Uncategorized Definitions

Message For New Users
Welcome to ProofWiki! Since you're new, you may want to check out the general help page. It's the best first stop to see how things are done (next to reading proofs, of course!). Please feel free to contribute to whichever area of mathematics interests you, either by adding new proofs, or fixing up existing ones. If you have any questions please feel free to contact me, or post your question on the questions page.

Here are some useful pages to help get you started:
 * Recent Changes - To keep up with what's new, and what's being added.
 * Main Page talk - This is where most of the main discussions regarding the direction of the site talk place. If you have any ideas, please share them!

Cheers, Joe

By Differentiation
$$x=\underbrace{1+1+1+\ldots+1}_{\mbox{x times}}$$

$$x^2 = \underbrace{x+x+x+\ldots+x}_{\mbox{x times}}$$

$$2x=\underbrace{1+1+1+\ldots+1}_{\mbox{x times}}$$, by differentiating w.r.t. $$x$$

$$2x=x$$

$$2=1$$