Pith Number

pith:6XAFB6XN

pith:2007:6XAFB6XNUNMZ4E3SL2USKLQ4ZT

not attested not anchored not stored refs pending

Time reparameterization in Bianchi type I spinor cosmology

B. Vakili, H. R. Sepangi

arxiv:0709.2988 v2 · 2007-09-19 · gr-qc · astro-ph · 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{6XAFB6XNUNMZ4E3SL2USKLQ4ZT}

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	2026-07-04T15:24:41.647783Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f5c050faeda3599e13725ea9252e1cccc014603566753f5f9b18e3d28ebbd8b3

Aliases

arxiv: 0709.2988 · arxiv_version: 0709.2988v2 · doi: 10.48550/arxiv.0709.2988 · pith_short_12: 6XAFB6XNUNMZ · pith_short_16: 6XAFB6XNUNMZ4E3S · pith_short_8: 6XAFB6XN

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/6XAFB6XNUNMZ4E3SL2USKLQ4ZT \
  | 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: f5c050faeda3599e13725ea9252e1cccc014603566753f5f9b18e3d28ebbd8b3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "52b6ed40d2f432b812feabbfe8d49c3a287b707a40d6c239405ff48726c62b15",
    "cross_cats_sorted": [
      "astro-ph",
      "hep-th"
    ],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "2007-09-19T10:47:46Z",
    "title_canon_sha256": "d9ced6896ba44ede15e9f977e6cec362c996772c50f8fcd0821474f924213d10"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0709.2988",
    "kind": "arxiv",
    "version": 2
  }
}