· 3 min 
from 「Modern Quantum Mechanics」: Sakurai, J. J.
The fundamental postulates to describe quantum mechanics.
· 2 min 
from 「Principle of Physics」: Halliday & Rensick
· 4 min 
from 「Geometrical Methods of Mathematical Physics」: Bernard F. Schutz
· 3 min from 「Principle of Physics」: Halliday & Rensick
· 1 min from 「Geometrical Methods of Mathematical Physics」: Bernard F. Schutz
· 11 min from 「Principle of Physics」: Halliday & Rensick
· 3 min 
from 「Topology」: James R. Munkres
· 1 min 
· 4 min 
from 「Linear Algebra: A Modern Introduction」: David Poole
· 9 min 