nayana-c1.867c992ae9100904cc61c84591adf0f8f863e0387e30f0d0dbc86640e9f50a1a.en.validation.42934

The task

Which of the following references discusses Complementary basic matrices? A. [1] M. Fiedler, Relations between the diagonal entries of an M-matrix and of its inverse. Mat.- fyz. €asopis SAV 121962, 123 — 128. B. [2] M. Fiedler, Relations between the diagonal elements of two mutually inverse positive definite matrices. Czechos/. Math. J. 14 (89), (1964), 39 — 51. C. [3] M. Fiedler, Notes on the Hilbert and Cauchy matrices. Linear Algebra Appl. 432(2010), 351 — 356. D. [4] M. Fiedler, Complementary basic matrices. Linear Algebra Appl. 384(2004), 199 — 206. Return only the single uppercase letter of the correct option.