Pith Number

pith:CXMW7672

pith:2019:CXMW7672QBZGWQFVDPO52UOH4O

not attested not anchored not stored refs pending

On using inspiralling supermassive binary black holes in the PTA frequency band as standard sirens to constrain dark energy

Changshuo Yan, Wen Zhao, Youjun Lu

arxiv:1912.04103 v2 · 2019-12-09 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CXMW7672QBZGWQFVDPO52UOH4O}

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	2026-07-05T00:40:05.643574Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

15d96ffbfa80726b40b51bdddd51c7e38d940ce8fe72214be7e11c45dc48003f

Aliases

arxiv: 1912.04103 · arxiv_version: 1912.04103v2 · doi: 10.48550/arxiv.1912.04103 · pith_short_12: CXMW7672QBZG · pith_short_16: CXMW7672QBZGWQFV · pith_short_8: CXMW7672

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/CXMW7672QBZGWQFVDPO52UOH4O \
  | 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: 15d96ffbfa80726b40b51bdddd51c7e38d940ce8fe72214be7e11c45dc48003f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "91e04e6e966aea1644aea86b4c6c3c2ac63262cddcf162b6b7987e49df9236a3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-12-09T15:09:14Z",
    "title_canon_sha256": "ff02ffe15f80662c2508c14436a98fe0d8c27656d02dc0e9a1cbf4ffb8b1f55e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1912.04103",
    "kind": "arxiv",
    "version": 2
  }
}