2 problems

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Jorgensen–Schmitt–Werner conjecture for operator-valued quadratic relations
Jorgensen–Schmitt–Werner conjecture. If $\lVert T\rVert<1$ , then the resulting $C^*$ -algebra is isomorphic to the Cuntz–Toeplitz $C^*$ -algebra $\mathcal{O}_d$ . A sufficient conditi…
Conjectureopenc-star-algebras operator-algebras quadratic-relationsarXiv posted 2 days ago
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Broadhurst–Roberts quadratic relation conjecture for Bessel moments
Broadhurst–Roberts quadratic relation conjecture. The matrices satisfy
Conjectureopenbessel-moments quadratic-relationsarXiv posted 2 days ago

Jorgensen–Schmitt–Werner conjecture for operator-valued quadratic relations