(By Thierry DELORT)

This book, "Theories d'or 10e édition" gathers 4 fundamental theories.

-The first theory, the **modern Theory of Ether** is the most general theory of Ether ever published, and covers not only the field relative to Special Relativity but also all the
field relative to General Relativity and in particular the field of Astrophysics.

-The 2nd theory, the **Quantum Theory of Physical Variables** is a theory covering the whole of the field of classical Quantum Physics.

-The 3rd theory, the **Platonic Mathematical Theory** is a new fundamental theory of foundations of mathematics and logic.

-Thr 4th theory, the **random Theory of numbers** is a new branch of number theory, permitting to study random in numbers. It is also the 1st mathematical theory permitting to give a
theoretical justification to the famous Goldbach's Conjecture, and also to the conjecture of prime twins numbers.