Pith Number

pith:YVO3FQL6

pith:2006:YVO3FQL6AQXULFPA5OG7CW34B4

not attested not anchored not stored refs pending

Ghost conditions for Gauss-Bonnet cosmologies

Antonio De Felice (University of Sussex), Beatriz de Carlos, Gianluca Calcagni

arxiv:hep-th/0604201 v2 · 2006-04-27 · hep-th · astro-ph · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YVO3FQL6AQXULFPA5OG7CW34B4}

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	2026-07-04T15:20:01.441297Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c55db2c17e042f4595e0eb8df15b7c0f1194c7470e2d76871be9623b73cbd990

Aliases

arxiv: hep-th/0604201 · arxiv_version: hep-th/0604201v2 · doi: 10.48550/arxiv.hep-th/0604201 · pith_short_12: YVO3FQL6AQXU · pith_short_16: YVO3FQL6AQXULFPA · pith_short_8: YVO3FQL6

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/YVO3FQL6AQXULFPA5OG7CW34B4 \
  | 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: c55db2c17e042f4595e0eb8df15b7c0f1194c7470e2d76871be9623b73cbd990

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa2a9785dc986c1710e6bf3d7014048a257bfa3a413ec1c54858fb1aca3b71f5",
    "cross_cats_sorted": [
      "astro-ph",
      "gr-qc"
    ],
    "license": "",
    "primary_cat": "hep-th",
    "submitted_at": "2006-04-27T14:35:45Z",
    "title_canon_sha256": "03fa5396b3f1acb966105825b2baf0d839ca45db5086b50b93510178243aeb18"
  },
  "schema_version": "1.0",
  "source": {
    "id": "hep-th/0604201",
    "kind": "arxiv",
    "version": 2
  }
}