Matrices of same dimensions are added element by element. Order doesn't matter (commutative).
Image processing — Adding images (overlays, blending).
Social networks — Combining adjacency matrices.
Economics — Adding input-output matrices.
Physics — Superposition of wave amplitudes.
Data science — Combining feature matrices.
Computer graphics — Combining transformation effects.
Statistics — Adding covariance matrices.
Engineering — Combining stress matrices.
Finance — Portfolio aggregation.
Robotics — Combining sensor readings.
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