Comment on This feels wrong. I love it.
owenfromcanada@lemmy.world 1 month agoIf AB = i and BC = 0, then B would be in the same 2D space as C, but one of them would be “above” the other in 3D space (which doesn’t exist in this context, just as sqrt(-1) doesn’t exist in the traditional sense).
So this triangle represents a 2D object that is “standing up” on the page.
rtxn@lemmy.world 1 month ago
It makes sense if you represent complex numbers as
(a, b)
pairs, wherea
is the real part andb
is the imaginary part (just like the populara + bi
representation). AB’s length is(1, 0)
, AC’s length is(0, 1)
, and BC’s length will also be a complex number.TowardsTheFuture@lemmy.zip 1 month ago
Yes. Also if you think of i as a 90° rotation (with a length of the scalar coefficient infront of i, in this case 1) . Thus one rotates you outwards away from the 2D plane, and two of those gets you back to the 2D plane, just going the other direction.