Here I collect some old notes which might turn out to be useful for somebody. Or maybe not.

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Inverse matrix of order n+1 (or n-1)

1. Symmetric Matrix


2. Generic (nonsymmetric) Matrix

Perfect observations in a reduced-order analysis

Adjoint and Transpose

1. What the Transpose (Adjoint) Operator is used for


2. Adjoint, Transpose and Scalar Product