Berg, I. D.; Nikolaev, Igor G. Characterization of Aleksandrov spaces of curvature bounded above by means of the metric Cauchy-Schwarz inequality. (English) Zbl 1402.53027 Mich. Math. J. 67, No. 2, 289-332 (2018). Reviewer: Charalampos Charitos (Athinai) MSC: 53C20 53C45 51K10 PDFBibTeX XMLCite \textit{I. D. Berg} and \textit{I. G. Nikolaev}, Mich. Math. J. 67, No. 2, 289--332 (2018; Zbl 1402.53027) Full Text: DOI Euclid
Berg, I. D.; Nikolaev, I. G. On a distance between directions in an Aleksandrov space of curvature \(\leq K\). (English) Zbl 0977.53033 Mich. Math. J. 45, No. 2, 257-289 (1998). MSC: 53C20 PDFBibTeX XMLCite \textit{I. D. Berg} and \textit{I. G. Nikolaev}, Mich. Math. J. 45, No. 2, 257--289 (1998; Zbl 0977.53033) Full Text: DOI
Alexander, Stephanie B.; Berg, I. David; Bishop, Richard L. Cut loci, minimizers, and wavefronts in Riemannian manifolds with boundary. (English) Zbl 0817.53023 Mich. Math. J. 40, No. 2, 229-237 (1993). Reviewer: O.P.Singh (Aligarh) MSC: 53C20 PDFBibTeX XMLCite \textit{S. B. Alexander} et al., Mich. Math. J. 40, No. 2, 229--237 (1993; Zbl 0817.53023) Full Text: DOI
Berg, I. D. On approximation of normal operators by weighted shifts. (English) Zbl 0303.47022 Mich. Math. J. 21, 377-383 (1974). MSC: 47B20 47B15 47A55 PDFBibTeX XMLCite \textit{I. D. Berg}, Mich. Math. J. 21, 377--383 (1974; Zbl 0303.47022) Full Text: DOI
Berg, I. D. The conjugate space of the space of semiperiodic sequences. (English) Zbl 0144.16803 Mich. Math. J. 13, 293-297 (1966). PDFBibTeX XMLCite \textit{I. D. Berg}, Mich. Math. J. 13, 293--297 (1966; Zbl 0144.16803) Full Text: DOI
Berg, I. David The algebra of semiperiodic sequences. (English) Zbl 0195.13902 Mich. Math. J. 10, 237-239 (1963). PDFBibTeX XMLCite \textit{I. D. Berg}, Mich. Math. J. 10, 237--239 (1963; Zbl 0195.13902) Full Text: DOI
Berg, I. D.; Wilansky, A. Periodic, almost-periodic, and semiperiodic sequences. (English) Zbl 0128.34001 Mich. Math. J. 9, 363-368 (1962). PDFBibTeX XMLCite \textit{I. D. Berg} and \textit{A. Wilansky}, Mich. Math. J. 9, 363--368 (1962; Zbl 0128.34001) Full Text: DOI