User:Bluemaster

Personal This user is of Portuguese ancestry. This user has French ancestry This user attends or attended Stanford University. This user is a participant in WikiProject Statistics.

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.