Type: Article
Publication Date: 2019-11-22
Citations: 4
DOI: https://doi.org/10.4064/aa180827-26-2
The set of integers which can be written as the sum of four prime cubes has lower density at least $0.009664$. This improves earlier bounds of $0.003125$ by Ren, and $0.005776$ by Liu.
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