This paper reviews recent experimental and theoretical progress concerning many-body phenomena
in dilute, ultracold gases. It focuses on effects beyond standard weak-coupling descriptions, such as th . . . . .
Contents: The Microscopic Theory of Radiation; Lorentz Invariance and Conventions; Second Quantization; Classical Field Theory; Old Fashioned Perturbation Theory; Cross Sections and Decay Rates; The L . . . . .
We present a comprehensive introduction to spacetime algebra that emphasizes its practicality and power as a tool for the study of electromagnetism. We carefully develop this natural (Clifford) algebr . . . . .
Numerical methods play an ever more important role in astrophysics. This is especially true in theoretical works, but of course, even in purely observational projects, data analysis without massive u . . . . .