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Search: id:A143108
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| A143108 |
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Let H(2,d) be the space of polynomials p(x,y) of two variables with nonnegative coefficients such that p(x,y)=1 whenever x+y=1. a_n is the number of different polynomials in H(2,d) with exactly n distinct monomials and of maximum degree minus 1, i.e. of degree 2n-4. |
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+0
3
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OFFSET
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1,3
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REFERENCES
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J. P. D'Angelo and J. Lebl. Complexity results for CR mappings between spheres. to appear in Internat. J. Math., preprint arXiv:0708.3232.
J. P. D'Angelo, Simon Kos and Emily Riehl. A sharp bound for the degree of proper monomial mappings between balls. J. Geom. Anal., 13(4):581-593, 2003.
J. Lebl and D. Lichtblau. Uniqueness of certain polynomials constant on a hyperplane. preprint
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LINKS
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J. P. D'Angelo and J. Lebl. Complexity results for CR mappings between spheres, to appear in Internat. J. Math.
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FORMULA
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Possibly can be computed from A143107 except for the third term, but this is not proved. Let b_n be elements of A143107, then a_n = 2 ( b_2 b_{n-1} + b_3 b_{n-2} + ... + b_{n-1} b_2 )
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MATHEMATICA
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See the paper by Lebl-Lichtblau
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CROSSREFS
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Cf. A143107, A143109.
Sequence in context: A036649 A109887 A103038 this_sequence A014009 A085386 A133760
Adjacent sequences: A143105 A143106 A143107 this_sequence A143109 A143110 A143111
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KEYWORD
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hard,nonn,unkn
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AUTHOR
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Jiri Lebl (jlebl(AT)math.uiuc.edu), Jul 25 2008
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