Pith Number

pith:6Q6IXUUG

pith:2014:6Q6IXUUGE6MFPUDVQ5BIQX4UK3

not attested not anchored not stored refs pending

Parametric Resonance of Entropy Perturbations in Massless Preheating

Elisa G. M. Ferreira, Hossein Bazrafshan Moghaddam, Robert H. Brandenberger, Yi-Fu Cai

arxiv:1409.1784 v2 · 2014-09-05 · astro-ph.CO · gr-qc · hep-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{6Q6IXUUGE6MFPUDVQ5BIQX4UK3}

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	2026-05-18T01:37:11.399466Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f43c8bd286279857d0758742885f9456e8bc305c561aae0adfd8577a038b32e0

Aliases

arxiv: 1409.1784 · arxiv_version: 1409.1784v2 · doi: 10.48550/arxiv.1409.1784 · pith_short_12: 6Q6IXUUGE6MF · pith_short_16: 6Q6IXUUGE6MFPUDV · pith_short_8: 6Q6IXUUG

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/6Q6IXUUGE6MFPUDVQ5BIQX4UK3 \
  | 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: f43c8bd286279857d0758742885f9456e8bc305c561aae0adfd8577a038b32e0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "521b14faeffd15245933da6390e05958580573c8baf674ddfe400bac9569bf76",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2014-09-05T13:29:52Z",
    "title_canon_sha256": "f4531e7debd89b43a9e2868cda292802bc6f190880e55d3a23d144d11f916766"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.1784",
    "kind": "arxiv",
    "version": 2
  }
}