Reality and Imagination for real
Real and imaginary part of complex function 1/z - "Reality and Imagination" - for the first time drawn traditionally on paper, therefore I call it: "Reality and Imagination for real".
I picked the colors intuitively, but now I see: Red pill versus blue pill :-)
Geometric drawing - axonometry, creating the "3D view" from the view from above - "cloverleaf-like", placed in the center of the drawing - and from the side - where circles become just lines. Graphite pencil, watercolor pencils, ballpoint pens.
The contour lines of these functions are actually just circles whose radii decrease reciprocally with height, and which are aligned along one point of the circumference. The towers of reality and imagination can be rotated into one another. I also often call them "trumpets" - it's 4 trumpets, two blue and two red ones, each opening up to an infinite circle.
