Update week2.do.txt

Author: mhjensen

doc/src/week2/week2.do.txt

@@ -14,8 +14,6 @@ o introduced outer products and projection operators
 o introduced tensor products and showed how to construct state vectors for multiple qubits
 o introduced the spectral decomposition of operators
 !eblock
-Most of the material can be found in Scherer, Mathematics of Quantum Computations, chapter 2, available electronically via UiO's subscription.
-
 
 !split
 ===== This week's plans =====
@@ -24,7 +22,7 @@ Most of the material can be found in Scherer, Mathematics of Quantum Computation
 o tensor products of Hilbert Spaces and definition of Computational basis, partly repetition from last week
 o Reminder on spectral Decomposition from last week
 o Bloch sphere and representation of qubits
-o Spectral Decomposition, Measurements and Density matrices 
+o Spectral Decomposition (again), Measurements and Density matrices 
 o Wavefunction collapse as a result of measurement
 o Simple Hamiltonians and other operators
 o "Video of lecture to be added":"https://youtu.be/"