Semicanonical moving frame of the hypersurface in a unimodular 4-dimensional affine space
Libuše Marková (1971)
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica-Physica-Chemica
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Libuše Marková (1971)
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica-Physica-Chemica
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Włodzimierz M. Mikulski (1995)
Archivum Mathematicum
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We determine all natural functions on and .
Jan Mařík (1994)
Mathematica Bohemica
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A compact set is constructed such that each horizontal or vertical line intersects in at most one point while the -dimensional measure of is infinite for every .