Hartman, Philip Some characterizations of the Euclidean sphere. (English) Zbl 0361.53002 Nonlinear Anal., Theory, Methods Appl. 1, 37-48 (1976). MSC: 53A05 53A20 PDFBibTeX XMLCite \textit{P. Hartman}, Nonlinear Anal., Theory Methods Appl. 1, 37--48 (1976; Zbl 0361.53002) Full Text: DOI
Hartman, Philip; Wintner, Aurel Umbilical points and \(W\)-surfaces. (English) Zbl 0055.39601 Am. J. Math. 76, 502-508 (1954). PDFBibTeX XMLCite \textit{P. Hartman} and \textit{A. Wintner}, Am. J. Math. 76, 502--508 (1954; Zbl 0055.39601) Full Text: DOI
Hartman, Philip; Wintner, Aurel On parabolic curves on surfaces. (English) Zbl 0055.15203 Am. J. Math. 76, 81-86 (1954). PDFBibTeX XMLCite \textit{P. Hartman} and \textit{A. Wintner}, Am. J. Math. 76, 81--86 (1954; Zbl 0055.15203) Full Text: DOI
Hartman, Philip; Wintner, Aurel On pieces of convex surfaces. (English) Zbl 0051.12304 Am. J. Math. 75, 477-487 (1953). PDFBibTeX XMLCite \textit{P. Hartman} and \textit{A. Wintner}, Am. J. Math. 75, 477--487 (1953; Zbl 0051.12304) Full Text: DOI
Hartman, Philip; Wintner, Aurel On the third fundamental form of a surface. (English) Zbl 0050.37805 Am. J. Math. 75, 298-334 (1953). PDFBibTeX XMLCite \textit{P. Hartman} and \textit{A. Wintner}, Am. J. Math. 75, 298--334 (1953; Zbl 0050.37805) Full Text: DOI
Hartman, Philip; Wintner, Aurel On asymptotic parametrizations. (English) Zbl 0050.37804 Am. J. Math. 75, 488-496 (1953). PDFBibTeX XMLCite \textit{P. Hartman} and \textit{A. Wintner}, Am. J. Math. 75, 488--496 (1953; Zbl 0050.37804) Full Text: DOI
Hartman, Philip; Wintner, Aurel On the curvatures of a surface. (English) Zbl 0050.15904 Am. J. Math. 75, 127-141 (1953). PDFBibTeX XMLCite \textit{P. Hartman} and \textit{A. Wintner}, Am. J. Math. 75, 127--141 (1953; Zbl 0050.15904) Full Text: DOI
Hartman, Philip; Wintner, Aurel Envelopes and discriminant curves. (English) Zbl 0050.15903 Am. J. Math. 75, 142-158 (1953). PDFBibTeX XMLCite \textit{P. Hartman} and \textit{A. Wintner}, Am. J. Math. 75, 142--158 (1953; Zbl 0050.15903) Full Text: DOI
Hartman, Philip; Wintner, Aurel On geodesic torsions and parabolic and asymptotic curves. (English) Zbl 0047.15003 Am. J. Math. 74, 607-625 (1952). PDFBibTeX XMLCite \textit{P. Hartman} and \textit{A. Wintner}, Am. J. Math. 74, 607--625 (1952; Zbl 0047.15003) Full Text: DOI
Hartman, Philip On unsmooth two-dimensional Riemannian metrics. (English) Zbl 0046.15102 Am. J. Math. 74, 215-226 (1952). PDFBibTeX XMLCite \textit{P. Hartman}, Am. J. Math. 74, 215--226 (1952; Zbl 0046.15102) Full Text: DOI
Hartman, Philip; Wintner, Aurel On the asymptotic curves of a surface. (English) Zbl 0042.15701 Am. J. Math. 73, 149-172 (1951). PDFBibTeX XMLCite \textit{P. Hartman} and \textit{A. Wintner}, Am. J. Math. 73, 149--172 (1951; Zbl 0042.15701) Full Text: DOI
Hartman, Philip; Wintner, Aurel On the problems of geodesics. in the small. (English) Zbl 0042.15605 Am. J. Math. 73, 132-148 (1951). PDFBibTeX XMLCite \textit{P. Hartman} and \textit{A. Wintner}, Am. J. Math. 73, 132--148 (1951; Zbl 0042.15605) Full Text: DOI
Hartman, Philip On the local uniqueness of geodesics. (English) Zbl 0039.16803 Am. J. Math. 72, 723-730 (1950). PDFBibTeX XMLCite \textit{P. Hartman}, Am. J. Math. 72, 723--730 (1950; Zbl 0039.16803) Full Text: DOI
Hartman, Philip; Wintner, Aurel On the fundamental equations of differential geometry. (English) Zbl 0039.16802 Am. J. Math. 72, 757-774 (1950). PDFBibTeX XMLCite \textit{P. Hartman} and \textit{A. Wintner}, Am. J. Math. 72, 757--774 (1950; Zbl 0039.16802) Full Text: DOI
Hartman, Philip; Wintner, Aurel On the embedding problem in differential geometry. (English) Zbl 0038.33403 Am. J. Math. 72, 553-564 (1950). PDFBibTeX XMLCite \textit{P. Hartman} and \textit{A. Wintner}, Am. J. Math. 72, 553--564 (1950; Zbl 0038.33403) Full Text: DOI
Hartman, Philip Systems of total differential equations and Liouville’s theorem on conformal mappings. (English) Zbl 0034.09002 Am. J. Math. 69, 327-332 (1947). PDFBibTeX XMLCite \textit{P. Hartman}, Am. J. Math. 69, 327--332 (1947; Zbl 0034.09002) Full Text: DOI