Length Contraction Calculator 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

t5-215

Effect

Computation or source lookup only

Input and validation requirements

The formula is undefined at exactly |v/c|=1 and for |v/c|>1. An implementation that does not validate the domain can produce division-by-zero, NaN, or misleading outputs. The input convention must also enforce that v is a dimensionless fraction of c.

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": {
    "L0": 2,
    "L0_unit": "m",
    "v": 0,
    "v_unit": "fraction_of_c"
  },
  "expected_outputs": {
    "L": 2,
    "L_unit": "m",
    "gamma": 1
  },
  "working": "β=0.00. γ=1/√(1−β²)=1/√(1−0)=1/√1=1. L=L0/γ=2.0/1=2.0 m."
}

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-tranche5/tranche5-results.json