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arXiv 2011.04724math.FA
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布里渊球下引力势球谐展开的不收敛性:连续情形

Non-convergence of the spherical harmonic expansion of gravitational potential below the Brillouin sphere; the continuous case

C. Ogle, O. Costin, M. Bevis

摘要:

对于一个单行星$P$与引力势$V$,我们表明,对于每个$\varepsilon > 0$存在一个行星$P'$与引力势$V'$,与$(P',V')$“$\varepsilon$ -接近”$(P,V)$(在适当的$C^0$ -意义),其中$V'$的球谐展开不超过$\varepsilon$以下的布里渊球$P'$的距离。

英文摘要:

For a singleton planet $P$ with gravitational potential $V$, we show that for each $\varepsilon > 0$ there exists a planet $P'$ with gravitational potential $V'$, with $(P',V')$ "$\varepsilon$-close" to $(P,V)$ (in an appropriate $C^0$-sense) for which the spherical harmonic expansion of $V'$ does not extend more than a distance $\varepsilon$ below the Brillouin sphere of $P'$.

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