Although its planar projection resembles a 3-crossing trefoil knot (3₁), tracing the spline
reveals a non-alternating Gauss code (O₁, O₂, O₃, U₁, U₂, U₃).
The entire upper arc lies strictly in z > 0 and passes over
the lower z < 0 arc at all three crossings (C₁: 36.4 mm, C₂: 31.1 mm, C₃: 49.9 mm),
making it a 1-bridge unknot that unfolds smoothly into a circle via Reidemeister moves.
Source Fileunknot.blend (v4.01)
Spline SpineBézierCircle (48 CPs)
Centerline Arc Length989.69 mm
Tube Cross-Section Ø26.96 mm (r = 13.48 mm)
Bounding Box217.4 × 230.2 × 96.6 mm
Enclosed Volume561.22 cm³
Surface Area840.67 cm²
Alexander PolynomialΔ(t) = 1