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High-precision mass measurement of doubly magic Pb.
Eur Phys J A Hadron Nucl. 2022;58(10):202. doi: 10.1140/epja/s10050-022-00860-1. Epub 2022 Oct 25.
Eur Phys J A Hadron Nucl. 2022.
PMID: 36312005
Free PMC article.
The absolute atomic mass of 208 Pb has been determined with a fractional uncertainty of 7 10-11 by measuring the cyclotron-frequency ratio R of 208 Pb 41+ to 132 Xe 26+ with the high-precision Penning-trap mass spectrometer Pentatrap and computing the binding energies EPb …
The absolute atomic mass of 208 Pb has been determined with a fractional uncertainty of 7 10-11 by measuring the cyclotron-frequency ratio …
Group actions and higher signatures.
Weinberger S.
Weinberger S.
Proc Natl Acad Sci U S A. 1985 Mar;82(5):1297-8. doi: 10.1073/pnas.82.5.1297.
Proc Natl Acad Sci U S A. 1985.
PMID: 16593545
Free PMC article.
Let pi be a nontrivial finite group and M be a closed manifold. An interesting question is whether or not M has the R-homology type of a manifold admitting a free pi action. Here this problem is studied for actions that are "homologically trivial." If pi(1)M is nontrivial …
Let pi be a nontrivial finite group and M be a closed manifold. An interesting question is whether or not M has the R-homology type o …
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Oscillation of functions with a spectral gap.
Eremenko A, Novikov D.
Eremenko A, et al.
Proc Natl Acad Sci U S A. 2004 Apr 20;101(16):5872-3. doi: 10.1073/pnas.0302874101. Epub 2004 Apr 12.
Proc Natl Acad Sci U S A. 2004.
PMID: 15079072
Free PMC article.
Suppose that the Fourier transform of a real measure f on the real line satisfies f(x) = 0 for x in (-a, a). Then, when r --> infinity, the asymptotic lower density of the sequence of sign changes of f on the intervals [0, r) is at least a/pi. ...
Suppose that the Fourier transform of a real measure f on the real line satisfies f(x) = 0 for x in (-a, a). Then, when r --> infi …
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