The invariant partial ideal conjecture for C*-algebras

Let A\mathcal{A} be a CC^*-algebra. A partial ideal assigns an ideal π(V)\pi(V) to each commutative CC^*-subalgebra VAV\subset\mathcal{A}, compatibly with inclusions. It is invariant when, for every unitary uAu\in\mathcal{A} and every such VV,

uπ(V)u=π(uVu).u\pi(V)u^*=\pi(uVu^*).

The invariant partial ideal conjecture. A partial ideal of A\mathcal{A} arises from a total ideal if and only if it is an invariant partial ideal. Consequently, the map IπII\mapsto\pi_I is a bijective correspondence between total ideals and invariant partial ideals. This conjecture characterizes which contextwise ideal data come from genuine closed, two-sided ideals; the supplied text gives no resolution, while related structural results are established for von Neumann algebras.

Sources & referencesView supporting material

Primary source

Nadish de Silva and Rui Soares Barbosa, “Contextuality and noncommutative geometry in quantum mechanics”, arXiv:1806.02840 (2018).

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