670 notes - Ohio State University

Day 15 Mon. Oct. 28 Chap. 4 Erlanger Programm;Cayley’s Theorem; the Class Equation. Look at the handout on Klein’s Erlanger Programm. In particular, point to the last example on the handout “examples of group actions.” The upper half-plane defined there is often taken as a model of the hyperbolic plane. ................
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