Pith Number

pith:55JFAELD

pith:2012:55JFAELDLPNQKJTQAG7OW5X256

not attested not anchored not stored refs pending

Refractive index of a transparent liquid measured with a concave mirror

Amitabh Joshi, Juan D. Serna

arxiv:1202.2404 v1 · 2012-02-11 · physics.class-ph · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{55JFAELDLPNQKJTQAG7OW5X256}

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	2026-05-18T03:36:04.689870Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef525011635bdb05267001beeb76faef904b82c62aa99b1d6c605f700c8baeb1

Aliases

arxiv: 1202.2404 · arxiv_version: 1202.2404v1 · doi: 10.48550/arxiv.1202.2404 · pith_short_12: 55JFAELDLPNQ · pith_short_16: 55JFAELDLPNQKJTQ · pith_short_8: 55JFAELD

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/55JFAELDLPNQKJTQAG7OW5X256 \
  | 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: ef525011635bdb05267001beeb76faef904b82c62aa99b1d6c605f700c8baeb1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee7e957f400189b479b55eb837aca67e2956cfd2f7cba355aed36203e0784203",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2012-02-11T03:27:48Z",
    "title_canon_sha256": "1e20d945d252bd046a1d00b104fae0da160c69c44c997368e01c68678d7bbe72"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.2404",
    "kind": "arxiv",
    "version": 1
  }
}