Calculations II
c)
Practice finding the minimal projection faster! This was wrong ten times and took too long!
Proofs I
c)
Use the technique of adding a row of 1s or 0s to model the last condition and also get linear dependence for free. Very elegant. https://exams.vis.ethz.ch/exams/uqknw4yu.pdf?answer=zrhxxlc78q4msaig
Proofs II
c)
Show PDness of A by proving , which then implies that is invertible.