Pith Number

pith:ZX2SPPBR

pith:1999:ZX2SPPBRPTWSNRMFJIAJ42SYPI

not attested not anchored not stored refs pending

On signature transition in Robertson-Walker cosmologies

H. R. Sepangi, K. Ghafoori-Tabrizi, S. S. Gousheh

arxiv:gr-qc/9910020 v1 · 1999-10-06 · gr-qc · 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{ZX2SPPBRPTWSNRMFJIAJ42SYPI}

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	2026-05-18T02:37:27.904696Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cdf527bc317ced26c5854a009e6a587a0de979a8b8bcb7c5c8bac1faac19bb17

Aliases

arxiv: gr-qc/9910020 · arxiv_version: gr-qc/9910020v1 · doi: 10.48550/arxiv.gr-qc/9910020 · pith_short_12: ZX2SPPBRPTWS · pith_short_16: ZX2SPPBRPTWSNRMF · pith_short_8: ZX2SPPBR

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/ZX2SPPBRPTWSNRMFJIAJ42SYPI \
  | 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: cdf527bc317ced26c5854a009e6a587a0de979a8b8bcb7c5c8bac1faac19bb17

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a86651c32821cfa162b6dce89f4a0c9220e88995e529c26330c8f6768ee5fd09",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1999-10-06T15:49:37Z",
    "title_canon_sha256": "a233ff8cac441aace2d323b7516e3dcae5c84d7f4c825da229ca5cafb5792577"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9910020",
    "kind": "arxiv",
    "version": 1
  }
}