Monthly Archives: July 2012

Some more on simple systems

Continuation of my notes from “Reflection Groups and Coxeter Groups” by James E. Humphreys. is a simple system. Let be in and let be the reflection associated with . Of course, must take into -that’s what reflection does. But what … Continue reading

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I start the week knowing next to nothing about a topic. Come Friday, I can write a post about my (new found) understanding of this topic. This is the happiness for which I chose to do Phd-to experience this joy every … Continue reading

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