I · Torsional Cycle Current
The three gear layers form a Markov chain on a single 3-cycle. Drag the forward/reverse rates; the stationary π is solved live, the three edge currents are computed, and you can watch them coincide (Lemma 5) while the pump turns only when the forward rate-product beats the reverse one.
II · Hyperbolic Sparsemax Kernel on (ℤ/4ℤ)³
The kernel is built exactly as in the paper: rational annular spinors → square-root-free Lorentz lift → rational hyperbolic quadrance → sparsemax rows → symmetric base walk → reverse valve. The reverse valve (strength λ) breaks detailed balance. At λ=0 the walk is reversible and there is no current; turn it up and a global toroidal drift (arrows) emerges — the circulation Remark 22 left open, here computed from the kernel's own stationary π̂.
III · Golden Clifford Winding
The Clifford torus is intrinsically flat, so a straight winding line θ=t, γ=ratio·t can tessellate it without distortion. A rational ratio closes into a curve and retraces forever; an irrational ratio never closes and fills the surface. The golden ratio φ fills the most evenly of all (lowest discrepancy) — which is exactly why it is the right choice for the pumps' incommensurate gear ratios. (Even coverage ≠ O(1) lookup: this is a superb sampler, not an oracle.)
Left: the unrolled torus (θ,γ) ∈ [0,1)². The path is drawn live; watch a rational ratio lock onto a few strands while φ floods every cell.