She said “6 braids going up,” and we delivered a flawless feed-in ponytail to match. In this step-by-step tutorial, you’ll see how to achieve clean parts, smooth feed-ins, and a sleek high ponytail ...

pybhpt is a collection of numerical tools for analyzing perturbations of Kerr spacetime, particularly the self-forces and metric-perturbations experienced by small bodies moving in a Kerr background.