Pith Number

pith:2MH76K6L

pith:2016:2MH76K6LNB4VG5VNQM6IXNGZAI

not attested not anchored not stored refs pending

The HI Content of the Universe over the Past 10 Gyrs

J. Christopher Howk (Notre Dame), Joseph Ribaudo (Utica), J. Xavier Prochaska (UCSC), Marcel Neeleman (UCSD, Marc Rafelski (Goddard), Nicolas Lehner (Notre Dame), Nissim Kanekar (TIFR), UCSC)

arxiv:1601.01691 v2 · 2016-01-07 · 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{2MH76K6LNB4VG5VNQM6IXNGZAI}

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	2026-05-18T01:20:23.959731Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d30fff2bcb68795376ad833c8bb4d90234ac572c525f36ac8554816ae44055cc

Aliases

arxiv: 1601.01691 · arxiv_version: 1601.01691v2 · doi: 10.48550/arxiv.1601.01691 · pith_short_12: 2MH76K6LNB4V · pith_short_16: 2MH76K6LNB4VG5VN · pith_short_8: 2MH76K6L

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/2MH76K6LNB4VG5VNQM6IXNGZAI \
  | 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: d30fff2bcb68795376ad833c8bb4d90234ac572c525f36ac8554816ae44055cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "13e580b063470d2508816cb4ad23ccc8da14c75c269e999319988209c63bbed3",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-01-07T21:00:09Z",
    "title_canon_sha256": "1702db28dd45c93f9e1d4a9081c68a32eb0ab073106bd403a3f24406d3bd12ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.01691",
    "kind": "arxiv",
    "version": 2
  }
}