I tried to upload the code by copying from tex-file. It seems he does not like my formatting, but how can I change it? Has anyone had a similar problem?

# Q: Points in general position

Question. The above picture only show an affine part of the respective projective spaces. What happens if some of the points lie at infinity?

# Q: Image of the line at infinity

Consider the linear projection map for the homogeneous coordinates of the central projection described in the first lecture. What are the images of the points on the line $l_\infty$ if we assign homogeneous coordinates  $\svector{b_1\\b_2\\0}$ with $b_1 \neq 0$ to the points on the line?

# Q: Perspective drawing

How can you construct the perspective image of the first square given the position of the chessboard, your position (the “eye” point), and the position of the plane projected onto? The construction of the other “squares” is described in the first lecture.