Table 1.

Summary of the notation used for the carousel interface.

Symbol	Description
H	Horizontal dimension of the interface, i.e., number of columns. Corresponds to the length of each recommendation list.
V	Vertical dimension of the interface, i.e., number of rows. Corresponds to the number of carousels.
M	Total number of recommendation lists that can be used for the carousel layout, M ≥ V.
l	Total number of recommendations provided to the user. When evaluating a single list l = H. When evaluating a carousel layout l = HV.
V h	Number of columns of the interface that are immediately visible to the user, Vh ≤ H
V v	Number of rows of the interface that are immediately visible to the user, Vv ≤ V
δh	Number of columns that are revealed after a user action, δh ≤ Vh
δv	Number of rows that are revealed after a user action, δv ≤ Vv