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// Kvant
// Archive
Kvant,
2021
Number 6,
Pages
10–11
(Mi kvant3627)
Çàäà÷íèê «ÊÂÀÍÒÀ»
Çàäà÷è Ì2654–Ì2657, Ô2661–Ô2664
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©
Steklov Math. Inst. of RAS
, 2025
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