Having trouble finding this in the wiki:  I know that we can select from a
table using a boxed pair

A

0 1 2 3 4

5 6 7 8 9

10 11 12 13 14

15 16 17 18 19

20 21 22 23 24


(<1 3){A

8

How do I write a verb f to do the reverse, so that
8 f A
yields the result 1 3  ?

Thanks,
David
-- 
David Pinchbeck
Associate Professor of Mathematics
St. Joseph's College
Standish, ME
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