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A245292
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Decimal expansion of 'mu', an isoperimetric constant associated with the study of a vibrating, homogeneous plate clamped at the boundary of the unit disk.
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2
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0, 0, 9, 5, 8, 1, 9, 3, 0, 2, 6, 7, 8, 3, 9, 3, 1, 7, 5, 4, 9, 0, 2, 3, 2, 9, 3, 2, 1, 0, 7, 7, 8, 4, 3, 8, 7, 5, 8, 6, 9, 4, 4, 9, 5, 2, 9, 7, 3, 8, 5, 5, 1, 6, 1, 5, 7, 1, 3, 5, 2, 1, 6, 9, 3, 5, 8, 2, 0, 7, 3, 6, 1, 0, 2, 0, 2, 6, 7, 8, 4, 9, 1, 1, 2, 8, 8, 1, 7, 9, 0, 6, 6, 8, 7, 9, 5, 0, 8, 3, 7
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OFFSET
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0,3
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REFERENCES
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Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, Section 3.6 Sobolev Isoperimetric constants, p. 222.
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LINKS
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FORMULA
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mu = 1 / theta^4, where theta is the smallest positive root of I1(t)*J0(t) + I0(t)*J1(t) = 0, with I0, I1, J0, J1, Bessel functions.
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EXAMPLE
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0.0095819302678393175490232932107784387586944952973855161571352169358207361...
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MATHEMATICA
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theta = t /. FindRoot[BesselJ[0, t]*BesselI[1, t] + BesselI[0, t]*BesselJ[1, t] == 0, {t, 3}, WorkingPrecision -> 100]; mu = 1/theta^4; Join[{0, 0}, RealDigits[mu] // First]
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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