@AaronStevens You reverted the edit on this question when the OP himself approved it. I would really like to know the reason as you must have done for a definite purpose.
@Knight Sorry, I missed where the OP approved the edit. The first part of the question still mentions "non-vector", and the OP isn't really asking about "operations on scalars", so I rolled it back since it seemed to conflict with the original ideas.
If the OP did approve, it is probably because they believe that "operations on scalars" is the correct terminology
The OP is not asking about scalars, as scalars also follow the commutative law of addition
@AaronStevens yes I haven't asked about it in question cause I thought that then it might not be that specific. But do you know what type of quantity it is?
@JohanLiebert I am not sure if there is a specific name (there probably is, but I am either ignorant of it, or I am just having a lack in memory). It is true that these operations cannot be associated with vectors due to the lack of commutative addition.
Currently have 3 supervisions in the next few days but consider it looked at after that
really been struggling with motivation towards the course material as of late
Had some things happen over Christmas which wiped out my work ethic. And I still haven’t recovered. Spent the last few nights doing all my work the day before and it’s killing me.
Any advice?
I don’t know if university is just hard. But I very rarely feel like I understand something these days.
Sorry for the TMI. But I thought if anybody knows what I’m feeling rn then it’s a bunch of professional physicists (or close enough)
@JakeRose It always gave me comfort that even von Neumann famously said: "Young man, in mathematics you don't understand things. You just get used to them."
@JakeRose I don't necessarily see it as a bad thing: "Understanding" in the sense of having some sort of moment of enlightenment where you suddenly grasp what you didn't before is rare (though it happens). Much more common is a gradual process where you see and use something so often that you stop worrying about "understanding" it because you don't need any sort of grand enlightenment anymore to find it useful and familiar.
(You can watch math.SE argue about differing interpretations of this quote here)
@AaronStevens Throws everyone off, really, even the guy who has the face (there's a lengthy scene in the game it's from where he looks into a mirror for the first time) :P
Let $A,B,C$ be points on the unit sphere and $AB,BC,AC$ be the geodesic distances between these points. Then the set of allowed $AB,BC,AC$ is characterized as $AB+BC\geq AC$, $AB+AC\geq BC$, $AC+BC\geq AB$ and $AB+BC+AC\leq \pi$.
@Semiclassical You sure that $\pi$ shouldn't be $2\pi$? If the three points are equidistant along a great circle, that sum should be the circumference of the great circle, no?
Do we still get notices when rep goes down? I mean: my rep just went down 15 - no big deal - but normally if a user was removed or if I had some answer unaccepted there’d be a message or something.
but now nothing. I suspect a user removed because I noticed I now have 2 fewer answered questions than earlier today...
@ZeroTheHero It wasn't a direct effect of user-deletion, but an effect of this answer being deleted because the question was deleted (because the user was deleted and negatively-scored posts get deleted upon user deletion). You didn't lose the rep from the upvotes because that's locked in after ~30 days or so, but you did lose the 15 for the accept.
That sort of rep loss isn't counted under "user removed", that one only counts the rep you lose when their votes are deleted.
