I cam across this notation: $x^TW_{\dots ij}$. I don't understand the notation. Why are there 3 dots?
Source: http://jmlr.csail.mit.edu/proceedings/papers/v28/goodfellow13.pdf, top of second page, second column.
2026-05-16 11:15:21.1778930121
What do the ellipses mean in $x^TW_{\dots ij}$
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