The problem:
(1 _10)H.(_10)2
_
The solution:
(1 _10)H.(_10+1e_7)2
2047
Thanks!
Bo.
Den 16:35 lørdag den 18. juni 2016 skrev 'Bo Jacoby' via Programming
<[email protected]>:
I was given this hint on how to compute a hypergeometric sum
Wikipedia:Reference desk/Mathematics - Wikipedia, the free encyclopedia
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F =. 3 : '+/(2^i)*|:(!/~)|.i=.i.>:y'
S =. 4 : '(y!x)*(1,-y)H.(-x)2'
G =. 3 : '>y(S&.>)i.>:y'
F 10
1 12 67 232 562 1024 1486 1816 1981 2036 2047
G 10
1 12 67 232 562 1024 1486 1816 1981 2036 _
wa=. 4 : '((x=y)*<:2^>:x)+(-.x=y)*x S y' NB. work around
H =. 3 : '>y(wa&.>)i.>:y'
H 10
1 12 67 232 562 1024 1486 1816 1981 2036 2047
Question: Is it a bug that (1 _10)H.(_10)2 evaluates to infinity?
Thanks! Bo.
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