Math is beautiful, enjoy it!

I had M.S. in Financial Engineering at Columbia University, and work at Bloomberg L.P. I'm a CFA Charter Holder.

Two useful links: MathJax, Real Analysis By Richard F. Bass

Keep at hand questions I found interesting and answered:

• Derivative and Anti-derivative
• Expectation of Conditional Random Variables
• Riemann rearrangement theorem at higher dimension
• Intuition for sigma algebra of probability space
• Basis in Hilbert space
• Hamel Basis v.s. Schauder Basis
• Subbasis for Cartesian Product Topology
• SDE for Geometric Brownian Motion

I love Chinese literature and history, and I'm a regular swimmer. I could be reached by zhayujie(at)hotmail(dot)com