Timeline for Can one calculate the following operator?
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| Jun 1, 2018 at 1:44 | comment | added | Christian Remling | We're of course dealing with Dirac's bra/ket notation here, and $|x\rangle\langle y|$ is the rank one operator $\langle y, \cdot\rangle x$. The series does converge to the identity strongly. The question is hardly suitable for MO though. | |
| Jun 1, 2018 at 0:46 | history | answered | Gerald Edgar | CC BY-SA 4.0 |