Pith Number

pith:NJKW23MP

pith:2013:NJKW23MPML2B53UNM5TNE3VRXR

not attested not anchored not stored refs pending

Einstein's equivalence principle in cosmology

Sergei M. Kopeikin (University of Missouri, USA)

arxiv:1311.4912 v3 · 2013-11-19 · gr-qc · astro-ph.CO · physics.hist-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{NJKW23MPML2B53UNM5TNE3VRXR}

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	2026-05-18T02:58:45.309875Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a556d6d8f62f41eee8d6766d26eb1bc55affbf5c07f1181ff77443a5faa5ed7

Aliases

arxiv: 1311.4912 · arxiv_version: 1311.4912v3 · doi: 10.48550/arxiv.1311.4912 · pith_short_12: NJKW23MPML2B · pith_short_16: NJKW23MPML2B53UN · pith_short_8: NJKW23MP

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/NJKW23MPML2B53UNM5TNE3VRXR \
  | 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: 6a556d6d8f62f41eee8d6766d26eb1bc55affbf5c07f1181ff77443a5faa5ed7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "895dd2fa71dd0603b30394a9f50b8479e03c399ce8822577eb9e52c7b777e634",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "physics.hist-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2013-11-19T22:38:44Z",
    "title_canon_sha256": "9ed9e8426b650daf109eed5bd0cf7434dbaaf43321e8390d7f27ef053c023f73"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.4912",
    "kind": "arxiv",
    "version": 3
  }
}