DataMuseum.dk

Presents historical artifacts from the history of:

RC4000/8000/9000

This is an automatic "excavation" of a thematic subset of
artifacts from Datamuseum.dk's BitArchive.

See our Wiki for more about RC4000/8000/9000

Excavated with: AutoArchaeologist - Free & Open Source Software. 

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⟦20c6e3f75⟧ TextFile

    Length: 768 (0x300)
    Types: TextFile
    Names: »extinvert«

Derivation

└─⟦621cfb9a2⟧ Bits:30002817 RC8000 Dump tape fra HCØ.  Detaljer om "HC8000" projekt.
    └─⟦0364f57e3⟧ 
        └─⟦58ca399f1⟧ »extbib« 
            └─⟦this⟧

TextFile

invert=algol list.yes index.no

external
procedure invert(n,a,b);
value n; integer n; array a,b;
begin
integer i,j;
integer array p(1:n);
array bj(1:n);
comment the procedure inverts the nonsingular matrix
        a(1:n,1:n) and stores the result in b;
decompose(a,p,0);
for j:=1 step 1 until n do begin
   for i:=1 step 1 until n do bj(i):= 0;
   bj(j):= 1;
   solve(a,p,0,bj);
   for i:=1 step 1 until n do b(i,j):= bj(i)
end end;
end
▶EOF◀