On sub-class sizes of mutually permutable products
نویسندگان
چکیده
منابع مشابه
On a class of meaningful permutable laws
The permutability equation G(G(x, y), z) = G(G(x, z), y) is satisfied by many scientific and geometric laws. A few examples among many are: The LorentzFitzGerald Contraction, Beer’s Law, the Pythagorean Theorem, and the formula for computing the volume of a cylinder. If we required that a permutable law be meaningful, the possible forms of a law are considerably restricted. The class of example...
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چکیده ندارد.
15 صفحه اولOn pairs of permutable Hermitian surfaces
We investigate the intersection R of two permutable Hermitian surfaces of PG(3, q2), q odd. We show that R is a determinantal variety. From the combinatorial point of view R comprises a complete (q2 + 1)-span of the two corresponding Hermitian surfaces.
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Using some geometry of quadrics permutable with a Hermitian surface H(3, q2) of PG(3, q2), q odd, a class of ovoids of H(3, q2) admitting the group PGL(2, q) is constructed.
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ژورنال
عنوان ژورنال: Open Mathematics
سال: 2021
ISSN: 2391-5455
DOI: 10.1515/math-2021-0030