A Phragmén - Lindelöf Principle for Subsolutions of Quasi - Linear Equations.
Seppo Granlund (1981)
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Seppo Granlund (1981)
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Zhanmin Zhu (2017)
Commentationes Mathematicae Universitatis Carolinae
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We give some new characterizations of quasi-Frobenius rings by the generalized injectivity of rings. Some characterizations give affirmative answers to some open questions about quasi-Frobenius rings; and some characterizations improve some results on quasi-Frobenius rings.
Robert H. Lohman (1974)
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E. W. Johnson (1970)
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Cabiria Andreian Cazacu (1981)
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Steffen König (1990)
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T. K. Pal, M. Maiti (1977)
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Iwo Labuda, Zbigniew Lipecki (1982)
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Pablo F. Meilán, Mariano Creus, Mario Garavaglia (2000)
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Roman Sikorski (1974)
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A. Defranceschi, Valeria Chiadò Piat (1990)
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Alfred Wiedemann, Steffen König (1990)
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Clarke, F. Marion (1952)
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Olivier Olela Otafudu, Zechariah Mushaandja (2017)
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We show that the image of a q-hyperconvex quasi-metric space under a retraction is q-hyperconvex. Furthermore, we establish that quasi-tightness and quasi-essentiality of an extension of a T0-quasi-metric space are equivalent.
D. J. Grubb (2008)
Fundamenta Mathematicae
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A quasi-linear map from a continuous function space C(X) is one which is linear on each singly generated subalgebra. We show that the collection of quasi-linear functionals has a Banach space pre-dual with a natural order. We then investigate quasi-linear maps between two continuous function spaces, classifying them in terms of generalized image transformations.