Leveraging Social Relationship-Based Graph Attention Model for Group Event Recommendation

Table 1

Notation.

Symbols	Descriptions
	The set of group ()
	The set of user ()
	The set of event ()
	The group-event graph
	The user-event graph
	The event-user graph
	The user-user graph
	The event-event graph
	The set of social friends of user
	The set of events interacted by user
	The set of users who participated in event
	The set of social events of event
	The set of users who are in the group
	The embedding of user
	The embedding of event
	The embedding of the rating value ,
ui^E	The event space user latent factor from event set of user
	The social space user latent factor from social friends set of user
	The user latent factor of user , combining from event space and social space
	The interaction and opinions representation of event for user
	The user space event latent factor from user set of event
	The social space event latent factor from social events set of event
	The event latent factor of event , combining from user space and social space
	The interaction and opinions representation of user for event
	The group latent vector of
	The attention weight of event in contributing to
	The social attention weight of user in contributing to
	The attention weight of user in contributing to
	The social attention weight of event in contributing to
	The attention weight of user in contributing to
	The rating value of event by group
	The predicted rating value of event by group
	The concatenation operator of two vectors
	The weight in neural network
	The bias in neural network