Full text: [Disquisitiones arithmeticae] (1. Band)

DETERMINANTES NEGATIVI. 
153 
Solutio. Sint formae {a, h, a) = F; [a, V, a) = F'; [a , b", a") == F"; 
{a"', h'", a"") = F' etc. Designentur ---, —■, h -XJ ) - etc, respective per 
fi, h", K" etc. Sint indeterminatae formarum F,F', F" etc. af,y ; F,/ etc. 
Ponatur F transmutari 
in F' positis <2? = aV -f- Wy\ y = yV -f- 3y 
F" . . . X = d'æ" + 6y, y = yV' + gy 
F'" ... ® = aV'+ ry", y = y'V"+ ry 
etc. 
Tum quia F transit in F' positis a? = —y, y = a?' -j- /n/ 
F' in F" positis a/=—y', y = x" h"y" 
F" in F'" positis a?"= — y"', y — x"-\- K"y" etc. (art. 160) 
facile eruetur sequens algorithmus (art. 159): 
a = 0 6' = — 1 y' = 1 3' = A' 
a" = d' h" == Fd' — a y" = 8 F = F3' — y' 
a" = d" d'" = r d" — a" Y' = F 3'" = r F — y" 
a'"' = d'" d'"' = A""d"'— d" Y" = = A W T— y'" 
etc. 
sive 
a' — 0 6' = — 1 y = 1 3' = h' 
d' = d' d" == Fd' Y = $ 8" = Fff — 1 
a"' = g" 6” = A'T- S' y" = 8" 8”=h"S'—8 
a" = H'" g"'= Ö" Y"'= S" c""= h""c"—o' 
etc. 
Omnes has transformationes esse proprias tum ex ipsarum formatione tum 
ex art. 1 59 nullo negotio deduci potest. 
Algorithmus hic perquam simplex et ad calculum expeditus, algorithmo in 
art. 27 exposito est analogus, ad quem etiam reduci potest *). Ceterum solutio 
*) Erit scilicet in signis art. 27, 6 n = + [—h", h'", — h"" . .. + h”] 
ubi signa ambigue posita, esse debent ; h; ~\ 5 + + i prout n formae 4&-H»; i; 2, 3, 
et h n = + \h', - h", h’" ± h n ~\ 
ubi signa ambigua esse debent -) ;-|—p; ; p, prout n formae ih + 0; 1; 2; 3. Sed hoc, quod 
quivis facile ipse confirmare poterit, fusius exsequi, nobis brevitas non permittit. 
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