User:Bluemaster

Wikipedia is a fantastic project. I've been working on these pages:

Ballet/Karate:
 * Ulyana Lopatkina (reorganization, new and improved information, major editing)
 * Galina Mezentseva (page creation)
 * Japan Karate Association (major reorganization)

Math/Statistics:
 * Mean Squared Error (corrections on the MSE expressions and technical comments)
 * F distribution (editing and addition of properties)
 * Chi-square distribution (references and properties)
 * Laplace's method (major reorganization, spliting from steepest descents)
 * Watson's lemma (page creation)
 * Faà di Bruno's formula (credited the first statement to Arbogast, in 1800)
 * Proofs of convergence of random variables (corrections made on proofs)

Biographical notes on mathematicians/statisticians:
 * G.N. Watson (added that he proved in 1918 what is known as Watson's lemma)
 * Louis François Antoine Arbogast (mentioned that he was the first to state Faà di Bruno's formula)
 * Francesco Faà di Bruno (mentioned that his role in developing the formula is controversial)

Its a minor contribution but has been fun.


 * See this link to find out the number of accesses to an wikipedia article.

My interests (professional and for fun):
 * Statistics and probability theory
 * Operations research (optimization, decision analysis)
 * Computer science and IT
 * Economics and Business applications
 * R Project
 * Ballet (my daughter is a ballerina! and I like to watch)
 * Karate (I've practiced with some interruptions for the last 30 years - Shotokan, JKA)

My academic background includes a Ph.D. at Stanford University and I work as a faculty at a major university in Brazil.

Suggestions and comments are welcomed.