Erdős problem 325 · problems.science

Writing $f_{k, 3}(x)$ for the number of integers $\leq x$ which are the sum of three $k$ th powers, is it true that $f_{k, 3}(x) \gg x ^ (3 / k)$ ?

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Problem row: sha256:1c4c6c6c23b7d33321d6e049bdefe6ce15ea43c0858dae68db282c6114270981
Metadata: sha256:b0838cd4f3a82b5fdb1e81792c54ba79c3ae1f08ea6a1a75a1c3b4e4df0948d6
Observation: sha256:8c823d621b7e1256c8e47c60a5f1c54c016a5507e6f27b2bab537f6f5f232067
Content: sha256:985550d4d786a2cd8ceb92f39124eb5e49944cc66505677bf95e26dbf02b2304

Repository: sha256:a956b84c437202e5a02cc9e036a621bd14a302b34a75758115730bdbb77c52a4
Projection: sha256:c9d14c459c518937e758918b5897dc3b22f1a55f07739afe99502f5b046c907a
Source commit: 2415f78e850aeee50afdca525c6f2e0ea606f207