Pith Number

pith:N6HP2U6I

pith:2001:N6HP2U6IV53LFTCWQ4PAQNN7WG

not attested not anchored not stored refs pending

A Metric Determined by Photon Exchange

Charles Francis

arxiv:physics/0108012 v2 · 2001-08-08 · physics.gen-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{N6HP2U6IV53LFTCWQ4PAQNN7WG}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-04T14:43:28.561712Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6f8efd53c8af76b2cc56871e0835bfb189ea1645db98778f6c9a56308865b45f

Aliases

arxiv: physics/0108012 · arxiv_version: physics/0108012v2 · doi: 10.48550/arxiv.physics/0108012 · pith_short_12: N6HP2U6IV53L · pith_short_16: N6HP2U6IV53LFTCW · pith_short_8: N6HP2U6I

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/N6HP2U6IV53LFTCWQ4PAQNN7WG \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 6f8efd53c8af76b2cc56871e0835bfb189ea1645db98778f6c9a56308865b45f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "75a6c01d0ce8326d48f5af4ee3e0771db66df4de8623425472775cd9b3914953",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "physics.gen-ph",
    "submitted_at": "2001-08-08T14:21:47Z",
    "title_canon_sha256": "cd9c0dd4c8645b1309a3103939e88b621f32ac3407b6df9be244771f1e505a97"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0108012",
    "kind": "arxiv",
    "version": 2
  }
}