User blog comment:B1mb0w/J Function Sandpit J 7/@comment-25601061-20151208191949/@comment-10262436-20151209080030

Hi. Refer to the Notation section of this blog. I introduce an aster to identify which input parameter will be acted on for nested powers of the J function.

The aster is clumsy visually and i wanted to use underline instead but I cant find the markup syntax for underline.