[A:1] Daily scala: Enumeration J. Eichar 2009 http://daily-scala.blogspot.com/2009/08/enumerations.html

[A:2] Matrices and Linear Transformations 2nd edition C. Cullen, Dover Books on Mathematics 1990

[A:3] Linear Algebra: A Modern Introduction D. Poole, BROOKS/COLE CENGAGE Learning 2010

[A:4] Matrix decomposition for regression analysis D. Bates 2007 http://www.stat.wisc.edu/courses/st849-bates/lectures/Orthogonal.pdf

[A:5] Eigenvalues and Eigenvectors of Symmetric Matrices I. Mateev 2013 http://www.slideshare.net/vanchizzle/eigenvalues-and-eigenvectors-of-symmetric-matrices

[A:6] Linear Algebra Done Right 2nd edition §5 Eigenvalues and Eigenvectors S. Axler, Springer 2000

[A:7] First Order Predicate Logic S. Kaushik, CSE India Institute of Technology, Delhi http://www.cse.iitd.ac.in/~saroj/LFP/LFP_2013/L4.pdf

[A:8] Matrix Recipes J. Movellan 2005

[A:9] Gradient descent: Wikipedia, the free encyclopedia Wikimedia foundation http://en.wikipedia.org/wiki/Gradient_descent

[A:10] Large Scale Machine Learning: Stochastic Gradient Descent Convergence A. Ng Stanford University https://class.coursera.org/ml-003/lecture/107

[A:11] Large-Scala Machine Learning with Stochastic Gradient Descent L. Bottou 2010 http://leon.bottou.org/publications/pdf/compstat-2010.pdf

[A:12] Overview of Quasi-Newton optimization methods Dept. Computer Science, University of Washington

[A:13] Lecture 2-3: Gradient and Hessian of Multivariate Function M. Zibulevsky 2013 http://www.youtube.com

[A:14] Introduction to the Lagrange Multiplier ediwm.com Video http://www.noodle.com/learn/details/334954/introduction-to-the-lagrange-multiplier

[A:15] A brief introduction to Dynamic Programming (DP) A. Kasibhatla, Nanocad Lab http://nanocad.ee.ucla.edu/pub/Main/SnippetTutorial/Amar_DP_Intro.pdf

[A:16] Financial ratios Wikipedia http://en.wikipedia.org/wiki/Financial_ratio

[A:17] Getting started in Technical Analysis §1 Charts: Forecasting Tool or Folklore? Schwager John Wiley & Sons 1999

[A:18] Getting started in Technical Analysis §4 Trading Ranges, Support & Resistance J Schwager John Wiley & Sons 1999

[A:19] Options: a personal seminar §1 Options: An Introduction, What is an Option S. Fullman New Your Institute of Finance, Simon Schuster 1992

[A:20] Options: a personal seminar §2 Purchasing Options S. Fullman New York Institute of Finance, Simon Schuster 1992

[A:21] List of financial data feeds: Wikipedia, the free encyclopedia Wikimedia foundation http://en.wikipedia.org/wiki/List_of_financial_data_feeds