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A107469
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4-symbol substitution made from Cantor matrix by one level matrix self-similarity.
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0
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1, 1, 2, 3, 4, 3, 2, 1, 1, 1, 1, 2, 3, 4, 3, 2, 1, 1, 2, 2, 2, 4, 4, 4, 2, 2, 2, 3, 3, 3, 4, 4, 4, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 4, 4, 4, 3, 3, 3, 2, 2, 2, 4, 4, 4, 2, 2, 2, 1, 1, 2, 3, 4, 3, 2, 1, 1, 1, 1, 2, 3, 4, 3, 2, 1, 1
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OFFSET
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0,3
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COMMENTS
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Matrix: M={{4, 2,2 1}, {0, 6, 0, 3}, {0, 0, 6, 3}, {0, 0, 0, 9}} Characteristic Polynomial: -x^4+25*x^3-228*x^2+900x-1296
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LINKS
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F. M. Dekking, Recurrent Sets, Advances in Mathematics, vol. 44, no.1, April 1982, page 85, section 4.15, see Cantor set.
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FORMULA
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1->{1, 1, 2, 3, 4, 3, 2, 1, 1}, 2->{2, 2, 2, 4, 4, 4, 2, 2, 2}, 3->{3, 3, 3, 4, 4, 4, 3, 3, 3}, 4->{4, 4, 4, 4, 4, 4, 4, 4, 4}
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MATHEMATICA
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s[1] = {1, 1, 2, 3, 4, 3, 2, 1, 1}; s[2] = {2, 2, 2, 4, 4, 4, 2, 2, 2}; s[3] = {3, 3, 3, 4, 4, 4, 3, 3, 3}; s[4] = {4, 4, 4, 4, 4, 4, 4, 4, 4}; t[a_] := Flatten[s /@ a]; p[0] = {1}; p[1] = t[p[0]]; p[n_] := t[p[n - 1]]; aa = p[3]
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CROSSREFS
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KEYWORD
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nonn,uned
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AUTHOR
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STATUS
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approved
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