Pith Number

pith:7L45ZXPQ

pith:2021:7L45ZXPQLQYNISHWAFQETFZCDC

not attested not anchored not stored refs pending

Classical and Semiclassical Stability of Emergent Universes in Jordan-Brans-Dicke Theory

Juan Ortiz, Pedro Labra\~na

arxiv:2108.09524 v3 · 2021-08-21 · gr-qc · astro-ph.CO · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7L45ZXPQLQYNISHWAFQETFZCDC}

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	2026-05-20T01:04:47.567527Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

faf9dcddf05c30d448f6016049972218a10ccd5ef9da08a4664b84a415bffbb8

Aliases

arxiv: 2108.09524 · arxiv_version: 2108.09524v3 · doi: 10.48550/arxiv.2108.09524 · pith_short_12: 7L45ZXPQLQYN · pith_short_16: 7L45ZXPQLQYNISHW · pith_short_8: 7L45ZXPQ

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/7L45ZXPQLQYNISHWAFQETFZCDC \
  | 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: faf9dcddf05c30d448f6016049972218a10ccd5ef9da08a4664b84a415bffbb8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2887bc1316f1679c7768c16b998b9fe503af1d8b1472c7f1ce53a3cbe41f540b",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "hep-th"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2021-08-21T15:01:47Z",
    "title_canon_sha256": "f2e87bdaedf7ba11bebafeb8e7c4f0402b33258a91cd7d4e3a59a1e2a00395ef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2108.09524",
    "kind": "arxiv",
    "version": 3
  }
}