Close-to-Convex · polynomial
The image of the unit disk under \(f\): concentric circles \(|z|=r\) and radial spokes mapped through \(f(z)=z+a_2z^2+\dots\); the bold curve is the boundary \(f(e^{i\theta})\). Rendered in your browser from the certified Taylor coefficients - nothing is computed server-side.
| Property | Kind | Params | Holds | Value / r | Status | Confidence |
|---|---|---|---|---|---|---|
| B | membership | {} | ✗ | 1.5210 | ✗ disproven | rigorous_verified |
| K | membership | {} | ✗ | -36.6828 | unscreened | - |
| N | membership | {} | ✗ | 2.0385 | ✗ disproven | rigorous_verified |
| ||T(f)|| | bound | {} | ✓ | 1.5210 | ✓ proven | rigorous_verified |
| r* | radius | {} | - | r ≤ 0.779 | 🔬 screened | numerical_strong |
| ||S(f)|| | bound | {} | ✓ | 2.0385 | ✓ proven | rigorous_verified |
| S* | membership | {} | ✗ | r ≤ 0.600 | ✗ disproven | proven |
| S | membership | {} | ✗ | - | unscreened | - |
| Verifier | Property | Direction | Outcome | Domain r | Witness | Engine |
|---|---|---|---|---|---|---|
| boundary_scan_closed_form_v31 | starlike | disproves | pass | 0.600 | 0.8*exp(i*2.374602) | boundary_v3.1 |
| pointwise_nehari_univalent_iv | nehari_univalent | disproves | pass | 0.816 | [-0.660334627425535, -0.4797611895392261] | gft-0.1.0-reaudit-20260610 |
| pointwise_becker_univalent_iv | becker_univalent | disproves | pass | 0.816 | [-0.660334627425535, -0.4797611895392261] | gft-0.1.0-reaudit-20260610 |
| pointwise_starlike_iv | starlike | disproves | pass | 0.990 | [-0.7121464023352646, -0.6877117867544074] | gft-0.1.0-reaudit-20260610 |
| boundary_scan_centered_v31 | starlike | disproves | pass | 0.600 | 0.8*exp(i*2.374602) | boundary_v3.1 |
| boundary_scan_polynomial | starlike | disproves | pass | 0.600 | 0.8*exp(i*2.374602) | boundary_v3.0 |