updates and error correction

content/Math401/Extending_thesis/Math401_R1.md

@@ -98,7 +98,7 @@ We want to define a vector space with notation of multiplication of two vectors
 That is
 
 $$
-(v_1+v_1)\otimes w=(v_1\otimes w)+(v_2\otimes w)\text{ and } v\otimes (w_1+w_2)=(v\otimes w_1)+(v\otimes w_2)
+(v_1+v_2)\otimes w=(v_1\otimes w)+(v_2\otimes w)\text{ and } v\otimes (w_1+w_2)=(v\otimes w_1)+(v\otimes w_2)
 $$
 
 and enables scalar multiplication by

content/Math401/Extending_thesis/Math401_R4.md

@@ -52,3 +52,5 @@ $$
 ## Quantum error correcting codes
 
 This part is intentionally left blank and may be filled near the end of the semester, by assignments given in CSE5313.
+
+[Link to self-contained report](../../CSE5313/Exam_reviews/CSE5313_F1.md)

content/Math401/Freiwald_summer/Math401_T6.md

@@ -76,7 +76,7 @@ This is a contradiction, so $|\psi^+\rangle$ is entangled.
 
 #### Density operator
 
-A density operator is a [Hermitian](https://notenextra.trance-0.com/Math401/Math401_T5#definition-of-hermitian-operator), positive semi-definite operator with trace 1.
+A density operator is a [Hermitian](./Math401_T5#definition-of-hermitian-operator), positive semi-definite operator with trace 1.
 
 The density operator of a pure state $|\psi\rangle$ is $\rho=|\psi\rangle\langle\psi|$.