Smoothness as an invariant property of coefficients of linear differential equations
František Neuman (1989)
Czechoslovak Mathematical Journal
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František Neuman (1989)
Czechoslovak Mathematical Journal
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Sury, B., Wang, Tianming, Zhao, Feng-Zhen (2004)
Journal of Integer Sequences [electronic only]
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Verdoodt, Ann (1994)
Bulletin of the Belgian Mathematical Society - Simon Stevin
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Sury, B. (2009)
Journal of Integer Sequences [electronic only]
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Edoardo Ballico (2005)
Open Mathematics
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Fix integers n, x, k such that n≥3, k>0, x≥4, (n, x)≠(3, 4) and k(n+1)<(nn+x). Here we prove that the order x Veronese embedding ofP n is not weakly (k−1)-defective, i.e. for a general S⊃P n such that #(S) = k+1 the projective space | I 2S (x)| of all degree t hypersurfaces ofP n singular at each point of S has dimension (n/n+x )−1− k(n+1) (proved by Alexander and Hirschowitz) and a general F∈| I 2S (x)| has an ordinary double point at each P∈ S and Sing (F)=S.
Suárez, C. (2010)
Advances in Difference Equations [electronic only]
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Panaitopol, Laurenţiu (2002)
JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only]
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Robbins, Neville (1988)
International Journal of Mathematics and Mathematical Sciences
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Bates, Bruce, Bunder, Martin, Tognetti, Keith (2005)
Acta Mathematica Academiae Paedagogicae Nyí regyháziensis. New Series [electronic only]
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Bouchard, Pierre, Chang, Hungyung, Ma, Jun, Yeh, Jean, Yeh, Yeong-Nan (2010)
The Electronic Journal of Combinatorics [electronic only]
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