Homework
12.17 - Check invariance of scalar product
12.18 - Exercises with matrices
12.24 - Proper velocity
12.26 - Invariant from 4-velocity
12.27 - Proper time for hyperbolic motion
12.29 - Quickie with relativistic energy-momentum
12.38 - Proper acceleration

Examples class
12.7 - Quick relativity problem, time dilation
12.8 - Clocks on spaceships problem
12.10 - Length contraction not parallel to boost
12.14 - Transformation of perpendicular velocities
12.19 - Rapidity