matrices.py

Created on December 03, 2025

413 Bytes

# MATRICES - SYNTHESE
# --- TRANSPOSE ---
# A^T = lignes <-> colonnes
# --- ADD / SUB ---
# A±B : elem par elem
# --- MULTIPLICATION ---
# (A*B)ij = somme A(i,k)*B(k,j)
# dim: (m×n)*(n×p) -> m×p
# --- DETERMINANT 2x2 ---
# |a b| = ad - bc
# |c d|
# det≠0 -> inverse existe
# --- INVERSE 2x2 ---
# A=[a b; c d] inv=1/(ad-bc)*[d -b; -c a]
# --- AUGMENTEE (general) ---
# (A|I) -> Gauss -> (I|A^-1)

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