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TUT21.JS
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Text File
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1991-06-13
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391b
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27 lines
PROGRAMS: recursive Gf
[ a=.3 3$'abcdefghi'
abc
def
ghi
(f=.i. -."1 0 i.) a
1 2
0 2
0 1
<"2 (minors=.f { 1&}."1) a
+--+--+--+
|ef|bc|bc|
|hi|hi|ef|
+--+--+--+
p=.'$.=. 1+1=#y.'
q=.'(0{"1 y.)-/ . *$:"2 minors y.'
r=.'0{,y.'
[ b=.?3 3$9
1 6 4
4 1 0
6 6 8
(det=.(p;q;r) : '') b
_112
s=.'(0{"1 y.)+/ . *$:"2 minors y.'
(permanent=.(p;s;r) : '') b
320