User blog comment:Hyp cos/A strong array notation (at my personal website)/@comment-99.185.0.100-20150712021327/@comment-11227630-20150712050506

There're many ways to make stronger notation. You can also make them as extensions of nested dropper array notation.

But in my extension, droppers are just bridge between multiple comma and the plus sign. And 2-droppers (droppers with "- 2") are just bridge between +m and the ⊕. They're not the main thing for extensions.