Supersonic interference flow effects on finned bodies

T justification for the Technical Note *'Practical Aspect of the Generalized Inverse of a Matrix lies in the fact that the constraint defined by Eq. (6) leads to Eq. (10), of which the latter defines a form of the generalized inverse. It is recognized that the column matrix { a. } in Eq. (7) of Ref. 1 corresponds to the column of Lagrangian multipliers associated with the minimum norm approach. As a practicing aeroelastician, this author occasionally needs a closed form expression for a solution to simultaneous equations with more unknowns than equations. In his opinion, the insight provided by Eq. (6), etc. of Ref. 1 is important to the aeroelastician. As it happens, the accompanying background and development considered necessary for providing this insight, summarize the most important aspects of the generalized inverse from an aeroelastician's point of view. It seems that the resulting restrictions and repetition of generally available results are the main target of Mr. Fang's remarks.