## The Social Network Actors and their Real-Life Counterparts

Here is the webpage introducing the movie The Social Network movie. Below are the photos of the actors in the movie and their counterparts in real life.

## About writing LaTex Formulas online and on WordPress

Online LaTex Equation Editor (this is similar to Scientific Workplace)

Latex Lab Project (hosted at Google Code) and LaTex to PDF can help write LaTex codes and compile codes without installing MikTex system on your local computer.

Online instructions and forums:

- Harvard Mathematics Department Computing: LaTex
- Cambridge University: Text Processing using LaTeX
- TeX Users Group
- Ink Scape is a free software for editing EPS graphic files. The EPS image file can be previewed on the webpage Online EPS Image Viewer.

The codes for the formula on WordPress.com are

$ latex cov(X,Y)=\mathbb{E}\left( cov(X,Y|Z)\right) +cov(\mathbb{E}(X|Z),\mathbb{E}(Y|Z)) $

where $ latex must stick together without a space. The reason that I separated $ from the word latex is that I want to avoid that formula from being displayed again so that purely codes are shown above.

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