A t-cover of a quadric Q is a set C of t-dimensional subspaces contained in Q such that every point of Q belongs to at least one element of C. We consider t-covers of the Klein quadric Q + (5, q). For t=2, we show that a 2-cover has at least q 2 +q elements, and we give an exact description of the e
Minimal multiplicative covers of an integer
โ Scribed by Carl G. Wagner
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 633 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0012-365X
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โฆ Synopsis
VfE[!. kj. 1 Ji+, Si#S)l have been studied Dreviously by Hcarnz and Wagner. The prrsent paper *-eats three arrays. rG(n. k). 61(n. k). and k(n. k). which extend min. k i in the sense .:hat I ., PI --l R*k)=~(p,...p,.k)=ri(p,.. -p,. k)= ni(s.k) for all sequences (r,. . . . _p,l of distinct primes.
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