Video errata Help Center Learn more.

Video: "Why Teleports Solve the Problem"
Time: 12:17
What: "Node y is more important than node a" instead of "node a is more important than node y"

Video "Frequent Itemsets"
Slide 25
Definition of "monotonicity": should be "if a set S appears at least s times, then so does every subset of S."

Video: "Content-Based Recommendations"

Time: 4:10

Definition of TF/IDF: f_kj in the denominator for TF_ij is "the maximum number of times any term (excluding possibly stop words) appears in the same document", not "the maximum number of times the term appears in any document".