Action of the modular group on the upper half plane. The diagram above depicts a fundamental region F for H∗/Γ(1) in H∗, along with nine of its translates. (Image by Dr. Andrew Sutherland.)
Dr. Andrew Sutherland
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This graduate-level course is a computationally focused introduction to elliptic curves, with applications to number theory and cryptography.
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Andrew Sutherland. 18.783 Elliptic Curves. Spring 2019. Massachusetts Institute of Technology: MIT OpenCourseWare, https://ocw.mit.edu. License: Creative Commons BY-NC-SA.