Scientific 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

t8-004

Effect

Computation or source lookup only

Input and validation requirements

The division-by-zero vector produces Infinity at the numeric evaluator level even though the mathematical result is undefined, and the unspecified logarithm-base convention can produce either 4.605170185988091 or 2 for the same displayed expression.

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": {
    "expression": "sin(30) + sqrt(81)",
    "angle_mode": "DEG"
  },
  "expected_outputs": {
    "result": 9.5
  },
  "reference_data": {
    "identity": "sin(30 degrees)=1/2",
    "formula": "sin(30 degrees)+sqrt(81)"
  },
  "working": "30 degrees = 30*pi/180 = pi/6. sin(pi/6)=1/2=0.5. sqrt(81)=9. Add: 0.5+9=9.5."
}

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-tranche8/tranche8-results.json