Two weeks ago, a modest-looking paper was uploaded to the arXiv preprint server with the unassuming title “On the invariant subspace problem in Hilbert spaces”. The paper is just 13 pages long and its ...
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Star Trek: What is subspace?
The lore of subspace dates back to the very earliest years of "Star Trek." But what does this concept mean, and how is it used across the franchise?
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