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propFrac()
Catalogue >
Si Var est omis, le développement des
fractions propres s'effectue par rapport à la
variable la plus importante. Les coefficients
de la partie polynomiale sont ensuite
ramenés à leur forme propre par rapport à
leur variable la plus importante, et ainsi de
suite.
Pour les expressions rationnelles, propFrac()
est une alternative plus rapide mais moins
extrême à expand().
Vous pouvez utiliser la fonction propFrac()
pour représenter des fractions mixtes et
démontrer l'addition et la soustraction de
fractions mixtes.
Q
QR
Catalogue >
QR Matrice, qMatrice, rMatrice [,Tol]
Calcule la factorisation QR Householder
d'une matrice réelle ou complexe. Les
matrices Q et R obtenues sont stockées
dans les NomsMat spécifiés. La matrice Q
est unitaire. La matrice R est triangulaire
supérieure.
L'argument facultatif Tol permet de
considérer comme nul tout élément de la
matrice dont la valeur absolue est
inférieure à Tol. Cet argument n'est utilisé
que si la matrice contient des nombres en
virgule flottante et ne contient pas de
variables symbolique sans valeur affectée.
Dans le cas contraire, Tol est ignoré.
Si vous utilisez /· ou finissez le
mode Auto ou Approché (Approximate)
sur Approché (Approximate), les calculs
sont ecutés en virgule flottante.
Si Tol est omis ou inutilisé, la tolérance
par faut est calculée comme suit :
Le nombre en virgule flottante (9.) dans m1
fait que les résultats seront tous calculés en
virgule flottante.
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