In this real life example, the bigger brace has a lot more freeboard* than
the smaller one does.
groff -ms <<!
.nr PS 12
.nr VS 14p
.LP
.EQ
left "" rpile {sum from j=0 to j sub 0 v(j,2i) above
sum from j=0 to j sub 0 v(j,2i+1)}~
right } =
left { pile { 1 sub "" , above 0, }~~~
lpile { i=i sub 0 above i sub 0 <i< i sub 1 }
.EN
!
I infer that the brace heights are rounded up to multiples of 1v and wonder
whether the parts couldn't be slid up and down less jerkily to provide a
consistent amount of freeboard.
* Borrowed from nautical usage, freeboard is the amount of brace that
extends vertically beyond the embraced text.
Doug
