Question about (5)equation

$$f_{bytes}⁢(p_j)$$ denote the sequence of bytes corresponding to patch, and the pooling function is followed by a linear projection, so,
Should it be $$P_{0,j}=ℰ_C(f(f_{bytes}(p_j)))$$?

Start by reading the paper section that defines f_bytes(p_j), the pooling function, and the linear projection around P_{0,j}. Compare the displayed notation with the surrounding definitions and record whether the proposed equation matches; done means the equation is clarified or corrected in the paper documentation.

Written by the indexing model from the issue text.