Pith Number

pith:OKZI6S3C

pith:2021:OKZI6S3CSSFFVQJPRVXX6OKWAA

not attested not anchored not stored refs pending

Measuring Cosmic Density of Neutral Hydrogen via Stacking the DINGO-VLA Data

A. M. Hopkins, Angel R. Lopez-Sanchez, Angus Wright, Attila Popping, B. W. Holwerda, E. N. Taylor, Jacinta Delhaize, J. Loveday, Julia Bryant, Lister Staveley-Smith, Martin Meyer, Martin Zwaan, M. E. Cluver, Qingxiang Chen, S. Brough, Simon Driver

arxiv:2104.07973 v1 · 2021-04-16 · 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{OKZI6S3CSSFFVQJPRVXX6OKWAA}

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

Weak Evolution of Cosmic Atomic Hydrogen over the Past 4.5 Billion Years

Receipt and verification

First computed	2026-07-05T03:21:46.847433Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

72b28f4b62948a5ac12f8d6f7f3956001630e3ee55dbd83a47894b2cc607334f

Aliases

arxiv: 2104.07973 · arxiv_version: 2104.07973v1 · doi: 10.48550/arxiv.2104.07973 · pith_short_12: OKZI6S3CSSFF · pith_short_16: OKZI6S3CSSFFVQJP · pith_short_8: OKZI6S3C

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/OKZI6S3CSSFFVQJPRVXX6OKWAA \
  | 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: 72b28f4b62948a5ac12f8d6f7f3956001630e3ee55dbd83a47894b2cc607334f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ab6a25d59691467b064bd3bc88d64548e38c4543327943e3eb8743b85ddacdd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-04-16T08:49:04Z",
    "title_canon_sha256": "b29022ca4e7a683cfa46049672ea9ef92aeb6ec2c3581bde790a4a42ab48cf12"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.07973",
    "kind": "arxiv",
    "version": 1
  }
}