Pith Number

pith:FR24D3E6

pith:2020:FR24D3E6BJ5TYD6ODPRDUVBPM7

not attested not anchored not stored refs pending

The cosmic atomic hydrogen mass density as a function of mass and galaxy hierarchy from spectral stacking

Barbara Catinella, Claudia del P. Lagos, Garima Chauhan, Lister Staveley-Smith, Luca Cortese, Tom Oosterloo, Wenkai Hu, Xuelei Chen

arxiv:2001.09073 v1 · 2020-01-24 · astro-ph.GA · 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{FR24D3E6BJ5TYD6ODPRDUVBPM7}

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	2026-07-05T00:40:09.832808Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c75c1ec9e0a7b3c0fce1be23a542f67d099aa3a7943ad168ebcce17f6105dac

Aliases

arxiv: 2001.09073 · arxiv_version: 2001.09073v1 · doi: 10.48550/arxiv.2001.09073 · pith_short_12: FR24D3E6BJ5T · pith_short_16: FR24D3E6BJ5TYD6O · pith_short_8: FR24D3E6

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/FR24D3E6BJ5TYD6ODPRDUVBPM7 \
  | 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: 2c75c1ec9e0a7b3c0fce1be23a542f67d099aa3a7943ad168ebcce17f6105dac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5a4fb25f3c0e64d394d344de39d77574d0afbab0b3c6c568d4550d4504ccad19",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-01-24T16:18:12Z",
    "title_canon_sha256": "3379f3cf466cae764696459d830ef9dbd8e6bfdfde772dc3435c2102bbdcb1af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2001.09073",
    "kind": "arxiv",
    "version": 1
  }
}