 Solution

False. An access matrix is an authorization table, not a numerical matrix representing a linear transformation. Its entries are sets of rights, such as permission to read or write an object. “Inverting” its organization means obtaining subject-oriented capability lists from object-oriented access control lists, or conversely, by enumerating and regrouping entries. Numerical floating-point matrix inversion has neither the relevant operations nor the relevant semantics, and many access tables are not even square.