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Is f rank (zero infinity) the same as outer product f for arbitrary function f?
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Brian McGuinness
Apr 7, 2022, 4:28:52 PM4/7/22
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A few trials in NARS2000 seem to suggest that these are equivalent, but I was wondering if there is some subtle difference I'm not aware of.
For example,
a←1 2 3 4 5
b←10 20 30 40 50 60
a (+⍤0 ∞) b
11 21 31 41 51 61
12 22 32 42 52 62
13 23 33 43 53 63
14 24 34 44 54 64
15 25 35 45 55 65
a ∘.+b
11 21 31 41 51 61
12 22 32 42 52 62
13 23 33 43 53 63
14 24 34 44 54 64
15 25 35 45 55 65
--- Brian McGuinness
For example,
a←1 2 3 4 5
b←10 20 30 40 50 60
a (+⍤0 ∞) b
11 21 31 41 51 61
12 22 32 42 52 62
13 23 33 43 53 63
14 24 34 44 54 64
15 25 35 45 55 65
a ∘.+b
11 21 31 41 51 61
12 22 32 42 52 62
13 23 33 43 53 63
14 24 34 44 54 64
15 25 35 45 55 65
--- Brian McGuinness
Elijah Stone
Apr 22, 2022, 2:05:18 AM4/22/22
to
outer product f is f⍤∞ 0⍤0 ∞
Brian McGuinness
May 15, 2022, 8:16:48 PM5/15/22
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Ok. Thanks.
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