Source: https://guthlabs.ai/docs/instruments/polar-curve-plotter/qualification/

instrument qualification / verified-with-binding-errata

# Polar Curve Plotter qualification

Verified with errata that must be applied at binding time.

Status: **VERIFIED_WITH_ERRATA**Lifecycle: **verified-with-binding-errata**

## Ledger verdict

Verified with errata that must be applied at binding time.

**Status**: VERIFIED_WITH_ERRATA

**Tranche**: tranche-8

**Review vectors**: 4

**Ledger rows**: 1

## Applied errata

````
[
  {
    "vector": 1,
    "field": "enclosed_area_exact / numeric",
    "wrong": "2π ≈ 6.2832",
    "correct": "4π ≈ 12.5664",
    "cause": "area of a circle of radius 2 (r(θ)=2 constant) is π·r²=4π; her own working evaluates 1/2·4·(2π) and writes the intermediate product as \"4π/2\" instead of 4π, dropping a factor of 2 in the polar-area integral ∫½r²dθ"
  }
]
````

## Adversarial re-test context

The full catalog was re-tested from boundary, convention, and self-check angles in 2,787 requests. Five genuine computational defects were independently verified and corrected. This page reports the current ledger state for this instrument; it does not imply product deployment or interface qualification.

## Release gate

Bind every attached correction, replay the affected vectors, enforce boundary validation, and preserve evidence before describing the executable surface as qualified.

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/polar-curve-plotter/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/polar-curve-plotter/mechanism/>)[03**Implementation**](<https://guthlabs.ai/docs/instruments/polar-curve-plotter/implementation/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `STRESS_TEST_RECEIPT.json`

- `tranche errata record`