ehremo

maths, computing and finance

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August 7, 2013

Markowitz Optimization with CVXOPT

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Let $\mu$ be the expected return vector and $\Sigma$ be the return covariance matrix, then Markowitz seeks to minimize the portfolio varianc...
July 15, 2013

Covariance estimation

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Estimating the covariance matrix of a $d$-dimensional Gaussian random variable $X$ from $n$ observations is easy right? We all know we get a...
July 3, 2013

References in JSON

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Modern object-oriented programming languages store data as objects which reference each other, in other words as a directed graph where eac...
July 2, 2013

Mapping the Pyson syntax to JSON

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The problem with creating a new syntax like Pyson is that it's necessary to reimplement a parser in every programming you wish to use it...

Pyson get some more syntax

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Keeping in theme with the 'Python subset' idea, I thought of allowing keyword arguments in constructors as follows DateTime = Type...
June 28, 2013

Enabling formulas and code highlighting on Blogspot

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This blog uses MathJax to embed LaTeX-style formulas and Google Code Prettify  for syntax highlighting. To install these tools select the...
June 25, 2013

Pyson, something between JSON and Python

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JSON, by virtue of its minimalist nature, lacks a few features which make it difficult to efficiently represent some instances of structured...
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