A variable in the paper

[elevenofji]

What does the variable “A^k” mean in the transformer structure? Does it mean the attention matrix in different views?
In section 3.2 "Then the multi-head attention is performed over conversation tokens h^k{i:j} from different views k and form A^k separately."_

[jiaaoc]

A^k is the attended results in the cross attention for view k