2 problems

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Generalised Sylvester's conjecture for two prime factors
Generalised Sylvester's conjecture. If $n\not\equiv\pm1\pmod9$ , then
Conjectureopencube-sum-problem elliptic-curves mordell-weil-rankarXiv posted 2 days ago
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Generalised Sylvester's conjecture for cube-sum elliptic curves
Generalised Sylvester's conjecture. If $n\not\equiv\pm1\pmod 9$ , then $r_n\leq2k_1+k_2-1$ and $r_n\equiv k_2-1\pmod2$ . If $n\equiv\pm1\pmod9$ , then $r_n\leq2k_1+k_2$ and…
Conjectureopencube-sum-problem elliptic-curves mordell-weil-rankarXiv posted 2 days ago

Generalised Sylvester's conjecture for two prime factors