The Madelung constant of rock salt
Find a closed form for the Madelung constant of rock salt, M ≈ 1.7475645946, the alternating lattice sum of unit charges on Z^3.
Update from the catalog #1
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| 15 | 15 | "status": "open", |
| 16 | 16 | "as_of": "2026-10-20", |
| 17 | 17 | "catalog": "0521c19bbd38" |
| 18 | - } | |
| 18 | + }, | |
| 19 | + "review": true, | |
| 20 | + "approval": "first-time" | |
| 19 | 21 | } |