Suppose
]M =: 1;2;2;3;3;3
+-+-+-+-+-+-+
|1|2|2|3|3|3|
+-+-+-+-+-+-+
]N =: 1;2;3
+-+-+-+
|1|2|3|
+-+-+-+
Call these sets.
Do you like
M -. N
$ M -. N
0
for M minus N ? Or would you prefer
M minus N
+-+-+-+
|2|3|3|
+-+-+-+
$ M minus N
3
?
If the latter, how do you write verb minus?
If
]K =: 1;2;3;3;3;3
+-+-+-+-+-+-+
|1|2|3|3|3|3|
+-+-+-+-+-+-+
what do you like for K union M? And how do you write verb union?
K
+-+-+-+-+-+-+
|1|2|3|3|3|3|
+-+-+-+-+-+-+
M
+-+-+-+-+-+-+
|1|2|2|3|3|3|
+-+-+-+-+-+-+
Finally, what do you like for K intersect M, and how do you write verb
intersect?
Kip
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