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Public evidence

physics.em.magnetic_field

Machine-checked verification for calculation version 1.0.0 · tier engine_tested

Open calculator API Capability Download JSON CVP Manifest MCP Review policy

CVP: CVP VERIFIED · CVP protocol 1.0.0-proposed · Engineering assurance· Infinite straight wire / long solenoid · Protocol · Schema · Production report

Declared partition coverage
PASS · 2/2 declared partitions (B, invalid-domain)
Versions
Calculation 1.0.0 · CVP protocol 1.0.0-proposed
CVP identity
1/1 property · digest e23296fe2662

Verification

Legacy regression suite: 3/3 calculation tests · Production surface contract 4/4

Three distinct suites: educational examples on the calculator page, this legacy regression count (3/3 golden + boundary), and the CVP verification suite below. They are not the same number. Property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the CVP Manifest . SKIP (0/0) means that suite has no published vectors.

    This calculator CURRENT · Public schema 1.0.0 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓

CVP verification suite

Protocol checks from the Evidence Manifest. Distinct from the legacy regression suite above. Calculation version 1.0.0. CVP 1.0.0-proposed. 1/1 golden · 1/1 CVP boundary · 1/1 invalid · 1/1 property · 1/1 cross-interface · 1/1 CVP contract. digest e23296fe2662.

  • Golden (oracle-backed) 1 / 1
  • CVP boundary 1 / 1
  • Invalid input 1 / 1
  • Property 1 / 1
  • Cross-interface 1 / 1
  • CVP contract 1 / 1
  • Interfaces PASS · UI (SSR) / REST / MCP
  • Interface claim ui-ssr is query-result HTML, not a live browser session.
  • Assurance Engineering
  • release artifacts aligned PASS
  • schema valid input executes PASS
  • engine success output validates schema PASS
  • schema rejects incomplete input PASS

Fingerprint sha256:4b1a3a0a43dd9a67e949410f90a0e3b60516dd8bb5f4d0d5a397f32320824f42

Input schema sha256:a93b114f22f2de219c5092ae7dd8682030b66983672c62ca9db1933a19cd5c4a · Output schema sha256:9e1dcbd4f23996b3def97e1b1c567ac4e90114b8f91e84b084682fcb876c5d84 · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Build & scope

Engine identity and declared limitations.

Tool
magnetic-field
Engine
magnetic-field
Engine build
2026-09-10
Evidence core
2026-09-10T22:48:17.762Z
Rendered
2026-09-16T22:03:43.766Z
Last reviewed
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Limitations

  • Ideal infinite wire / long solenoid

Sources

Standards and references supporting this tool specification. Methods are listed separately — they are algorithms, not bibliographic sources.

Legacy published checks

Golden and boundary cases from the legacy Evidence JSON. CVP property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the Manifest — including SKIP when a suite has no vectors.

IDKindStatusDetail
wiregoldenpassExpected B_T=0.00004 · Actual mode=wire · I_A=10 · r_m=0.05 · B_T=0.00004 · mu0=0.0000012566370614359173
badboundarypassExpected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
property-b-solpropertypass0.005026548245743669