Is f rank (zero infinity) the same as outer product f for arbitrary function f?

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Brian McGuinness

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Apr 7, 2022, 4:28:52 PMApr 7
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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

Elijah Stone

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Apr 22, 2022, 2:05:18 AMApr 22
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outer product f is f⍤∞ 0⍤0 ∞

Brian McGuinness

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May 15, 2022, 8:16:48 PMMay 15
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Ok. Thanks.
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