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  • $\begingroup$ @CrisLuengo, is it better now? $\endgroup$ Commented Jul 10, 2023 at 17:53
  • $\begingroup$ It was already good, I just though some might not pick up on that detail. Wonderful answer! $\endgroup$ Commented Jul 10, 2023 at 18:00
  • $\begingroup$ @Royi Thanks. I am already familiar with the lexicographical notation, but in the paper the $H$ operator is convolved with the image $x$ and not multiplied with it, (i.e. $H * x$). Do you believe it is a typo? I suspected $H$ may be related to the spatial varying nature of the proposed network. $\endgroup$ Commented Jul 13, 2023 at 6:24
  • $\begingroup$ @user153245, It is maybe just to show the convolution is with a 2D signal which is a matrix. $\endgroup$ Commented Jul 13, 2023 at 9:02