The function ____ returns a string containing an appropriate message.

In Twitter, Tweets are limited to 140 characters

Indicate whether the statement is true or false

For an undirected graph with the frequencies ? = { 0 , 1 , 2 , 4 , 5 } and the corresponding eigenvector matrix

calculate the resulting vector when the graph signal
f = [0,1,?2,0, 1]T is operated on by the graph Laplacian; that is, find Lf. Hint: Represent f as linear combination of the Laplacian eigenvectors.