> John Randall randall at andromeda.rutgers.edu
>
> NB. yth triangular number
> T=:2&!@>:
...
> NB. "inverse" of T
> TI=:13 : './> {: p. (-y),0.5 0.5'
...
> Does anyone have any suggestions on this? In particular are there
> better ways to go for the verb TI?
TI=:T^:_1
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