Equations to be made on slides. Regularization, vacuum polarization, spin zero particles.

Notes on a book by Cyril Bailey. Ancient Greece, mathematics.

Some mathematical corrections to a manuscript from Gürsey.

Corrections for "The theory of relativity".

Notes for the manuscript "Continuous groups in quantum mechanics"

Notes for the manuscript "Continuous groups in quantum mechanics".

Citation of a paper: Space-time representation and determinism.

Calculations and a note (M. Fierz: Harm. Oscillator).

Notes and calculations.