Went through the 11_LA_QR.ipynb notebook and made the vector notation consistent with the changes to the 10_LA_intro.ipynb notebook. Found some typos and tried to fix them to be more better.
Fixed several typos and found some places that were missing the previous vectors found in the Gramm-Schmidt orthogonalization process in the QR notebook.
Went through the 11_LA_QR.ipynb notebook and made the vector notation consistent with the changes to the 10_LA_intro.ipynb notebook. Found some typos and tried to fix them to be more better.