Pith Number

pith:ASJD66UQ

pith:2013:ASJD66UQ7PO7JACTIYCBMD7A72

not attested not anchored not stored refs pending

The Physics of the Far Future

Andrew P. Lundgren (Max Planck Institute for Gravitational Physics), Mihai Bondarescu (Universitatea de Vest, Ruxandra Bondarescu (University of Zurich), University of Mississippi)

arxiv:1305.6838 v1 · 2013-05-29 · gr-qc · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ASJD66UQ7PO7JACTIYCBMD7A72}

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	2026-05-18T03:22:17.799716Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

04923f7a90fbddf480534604160fe0fe82be3f2ad82ae97f020dfdf48c2f352a

Aliases

arxiv: 1305.6838 · arxiv_version: 1305.6838v1 · doi: 10.48550/arxiv.1305.6838 · pith_short_12: ASJD66UQ7PO7 · pith_short_16: ASJD66UQ7PO7JACT · pith_short_8: ASJD66UQ

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/ASJD66UQ7PO7JACTIYCBMD7A72 \
  | 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: 04923f7a90fbddf480534604160fe0fe82be3f2ad82ae97f020dfdf48c2f352a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0568a0aac635bb798a33a6572647bb105f3757fea942442838b0cdf96a180b6",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2013-05-29T15:59:16Z",
    "title_canon_sha256": "46b9b5ec8aa16375173e81f2e28adda91a2e39f68e754720116143ee8a08b4a8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.6838",
    "kind": "arxiv",
    "version": 1
  }
}