Truss Determinacy Checker implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t4-142

Effect

Computation or source lookup only

Input and validation requirements

The classifier has no division-by-zero operation, but extreme counts overflow JavaScript arithmetic and produce an infinite degree. More importantly, the meaning of r is convention-sensitive: counting supports instead of scalar reaction components can change the computed reaction count and classification unless the support model is explicitly defined.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "m": 3,
    "r": 3,
    "j": 3
  },
  "expected_outputs": {
    "classification": "determinate",
    "degree_of_indeterminacy": 0
  },
  "working": "m+r = 3+3 = 6. 2j = 2×3 = 6. Since 6 = 6, classification = determinate. Degree = (m+r)−2j = 6−6 = 0."
}

Other records

Sources and evidence

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

• VERIFIED_LEDGER.json
• evidence-tranche4/tranche4-results.json