Principia philosophiae cartesianae

Principia philosophiae cartesianae (PPC; "The Principles of Cartesian Philosophy") or Renati Descartes principia philosophiae, more geometrico demonstrata ("The Principles of René Descartes' Philosophy, Demonstrated in Geometrical Order") is a philosophical work of Baruch Spinoza published in Amsterdam in 1663. In the preface to this work, Ludovic Meyer explains that it is a reconstruction of René Descartes' Principles of Philosophy in the Euclidean or "geometric" fashion.

Source: Wikipedia — Principia philosophiae cartesianae (CC BY-SA 4.0)