Pith Number

pith:VQJH4SJ2

pith:2019:VQJH4SJ2AZLG6ZEZ4DZQTCNWAC

not attested not anchored not stored refs pending

Small-scale primordial fluctuations in the 21cm Dark Ages signal

Joseph Silk, Philippa S. Cole

arxiv:1912.02171 v1 · 2019-12-04 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VQJH4SJ2AZLG6ZEZ4DZQTCNWAC}

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.

Cited by

1 paper in Pith

Probing the small-scale primordial power spectrum via relic neutrinos and acoustic reheating

Receipt and verification

First computed	2026-07-05T01:55:44.490044Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac127e493a06566f6499e0f30989b600a1367045b2afb7962ca3ca2b4cee0d38

Aliases

arxiv: 1912.02171 · arxiv_version: 1912.02171v1 · doi: 10.48550/arxiv.1912.02171 · pith_short_12: VQJH4SJ2AZLG · pith_short_16: VQJH4SJ2AZLG6ZEZ · pith_short_8: VQJH4SJ2

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/VQJH4SJ2AZLG6ZEZ4DZQTCNWAC \
  | 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: ac127e493a06566f6499e0f30989b600a1367045b2afb7962ca3ca2b4cee0d38

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ccc36ae84e1011116d951feda3e967f13cf8a7d7f64eb3f18d844ac53442ff5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2019-12-04T18:51:15Z",
    "title_canon_sha256": "4a6acd3e77d62a706e88d52a8c0fe9b53b7692861ef60984455dedad51a49b5b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1912.02171",
    "kind": "arxiv",
    "version": 1
  }
}