Major changes are described.  Small changes are not mentioned.
All changes are marked by blue characters in the pdf file.

May 20, 2008
- Page 20: Axiom 5.2: Continuum case is better described.
- Page 21, top: Some words about "wave function collapse".
- Page 21, Theorem 5.4: Proof simplified.
- Page 21, bottom:
	(just before section 6.2 Schrodinger picture) 
	Hermitian, linear -> unitary (important typo corrections!!!)
- Page 22, at end of section 6.2:
	Some cautionary remarks added for U(t).
- page 22, 4 lines above equation (6.5):
	"and also using Theorem 3.16"  added
- page 24: End of Fact 7.4
	some grammatical errors corrected (I think)
- page 25: 
	The "note" after Theorem 8.1 became "Fact 8.2"
	Typo corrected: "normal" -> "natural" (bold faced part)
- page 25, Definition 8.3:
	"(Very Important!!!)" added

May 21, 2008
- page 18, Example 4.16, at end: "normal basis" -> "natural basis"
- pages 21-24: Section 6, restructured, expanded, more explanations, subscript H for Heisenberg picture

May 22, 2008
- page 23: H -> H_H

June 1, 2008
- page 12: Def. 3.32 (degeneracy) added