Notes on root systems (two roots)

by Markus Rost (Notes, September 2024, 6 pages)

This text contains just some explicit descriptions of the position of two roots, with 4 types of arrangements.

It was written as a prelude to Notes on root systems.

log3((4-m)/m)=3(2-m)/(m(4-m)) for m=0,1,2,3,4

Full text (October 24, 2024): [pdf]

Notes on root systems

by Markus Rost (Notes, October 2024, 36 pages)

Currently this is a draft of a part of projected notes on root systems.

(b-a*(b)a)*=b*-b*(a)a*

There is more to come, hopefully, but who knows.

Full text (October 27, 2024, with minor changes from November 27, 2024): [pdf]