While I think this question

On the definition of positive linear supermaps on Hilbert spaces

may be an interesting mathematical question about Hilbert spaces, why is it not closed for belonging instead to Mathematics as this question,

Cooling of 2 hot fluid streams

was closed for belonging to engineering, not to Physics?

  • 2
    $\begingroup$ Closing takes time. While the 2nd is clearly engineering, the first could go either way. You have VtC privileges so why not VtC as a math question if you think it is? $\endgroup$ Dec 30, 2022 at 19:50
  • 2
    $\begingroup$ Seconding ZeroTheHero's comment, the question that is not closed is only an hour old. The typical time it takes for a question to go through the close review queue is much longer than that. The closed/open status of (or even the votes on) such a recent question, especially during a time of low activity (Christmas/end-of-year holidays in many places), don't really say anything about what the community thinks about the question. $\endgroup$
    – ACuriousMind Mod
    Dec 30, 2022 at 19:58
  • $\begingroup$ @ZeroTheHero because I would not close either and usually prefer to defer to my elders... More importantly, I was not arguing either way, just wanted to know. $\endgroup$
    – hyportnex
    Dec 30, 2022 at 20:13
  • 2
    $\begingroup$ @hyportnex you have been a member for 9 years 2 months now; by comparison I have been member for 9 years and 4 months. You are as much of an "elder" as I am. $\endgroup$ Dec 30, 2022 at 20:42
  • $\begingroup$ Re "belonging to engineering": Do you mean the Stack Exchange site Engineering? $\endgroup$ Dec 31, 2022 at 12:51
  • $\begingroup$ Likely because someone who got lucky with a 1000+ point answer 10 years ago says so. $\endgroup$ Jan 22 at 4:21


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