Nicolás Quesada

mis·cel·la·ne·a

• Solutions to some of H. Goldstein’s Classical Mechanics book problems. The compiled pdf can be found here.
• Some useful equations in Atomic Physics.
• A conversion chart for squeezing in different units.
• ∇ in cylindrical and spherical coordinates originally from wikipedia in html.
• The classical version of a and a^†.
• The normal ordered form of (a+a^†)ⁿ.
• An identity involving the imaginary error function erfi(x) (with Aaron Goldberg).
• A collection of Mathematica and Python gists.
• A collection of short stories by Tomás Carrasquilla