Im Raum der positiven reellen Matrizen Y = Y(n) = (yμr) wird durch ds2 = σ(Y-l dY)2 (σ = Spur) eine positive Metrik erklart, die gegenuber den Transformationen Y → Y[R] = R'YR (R reell, |R| ≠ 0).
An analytical treatment of the problem of representation of quadratic forms T[rc] by a given positive form S[rc] seems to be possible in the following general shape: Let S = S(m) and T = T(n) with m > n be positive real matrices of m and n rows respectively.
