The equality of two condition numbers of a rectangular matrix recently established by C.C. Gonzaga and H.J. Lara [Linear Algebra Appl. 261 (1997) 269-273] is now proved by purely algebraic means. © 1999 Published by Elsevier Science Inc. All rights reserved.
Ikramov, K. D. (1999). An algebraic proof of a result by Gonzaga and Lara. Linear Algebra and Its Applications, 299(1–3), 191–194. https://doi.org/10.1016/S0024-3795(99)00181-0