Collaborative Filtering: Only create embedding for items


I want to implement collaborative filtering for only items. The user base will instead be represented as some aggregates of the items they interacted with. I understand that it is possible to specify only item in EmbeddingNN. But what does it do under the hood with the user? Will the user also be embedded with the same number of latent factors or aggregates of the embedding items?

Please help, or suggest how I can make myself clearer :slight_smile: