The concept of a sigma-algebra (a.k.a. a σ-algebra, sigma-field or σ-field) lies at the heart of measure theory, and therefore at the heart of axiomatic probability theory, and the related concept of a filtration is fundamental in the study of stochastic processes. However, many people studying probability have an uneasy relationship with these concepts. While the formal definitions themselves are easy to state and […]

There’s a wild meme on the loose. A significant number of people seem to have decided that “px” in CSS is an angular unit rather than a unit of length, and moreover that it is in some sense “non-linear”. This is wrong – WRONG! Confusion runs deep and common sense is imperiled. I’m going to […]

I created this blog in order to post this article about WinSxS. It is based on my own reading of the docs and some experimentation. It does not represent the views of Microsoft or my employer. WinSxS is not as new as it seems (apparently it dates back to Windows ME), nor is it as […]


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