2: Structures Last updated Jun 30, 2021 Save as PDF 7.4: Does All This Really Work? 8: Number Theory Page ID48256 Eric Lehman, F. Thomson Leighton, & Alberty R. MeyerGoogle and Massachusetts Institute of Technology via MIT OpenCourseWare ( \newcommand{\kernel}{\mathrm{null}\,}\) 8: Number Theory9: Directed graphs and Partial Orders10: Communication Networks11: Simple Graphs12: Planar Graphs