Pith Number

pith:ZHU5VWQ4

pith:2009:ZHU5VWQ4BDJWS32FJ6YVBPV266

not attested not anchored not stored refs pending

Molecular hydrogen deficiency in HI-poor galaxies and its implications for star formation

Alessandro Boselli, Giuseppe Gavazzi, J. Xavier Prochaska, Mark R. Krumholz, Michele Fumagalli

arxiv:0903.3950 v1 · 2009-03-23 · 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{ZHU5VWQ4BDJWS32FJ6YVBPV266}

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	2026-05-18T04:29:15.686704Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c9e9dada1c08d3696f454fb150bebaf7b9dadcb5198923bb9a1a2b66d1ee2a2c

Aliases

arxiv: 0903.3950 · arxiv_version: 0903.3950v1 · doi: 10.48550/arxiv.0903.3950 · pith_short_12: ZHU5VWQ4BDJW · pith_short_16: ZHU5VWQ4BDJWS32F · pith_short_8: ZHU5VWQ4

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/ZHU5VWQ4BDJWS32FJ6YVBPV266 \
  | 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: c9e9dada1c08d3696f454fb150bebaf7b9dadcb5198923bb9a1a2b66d1ee2a2c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4241ee5c219d5a4932018f5702251d174e7aaba0e08fceed42820586dfed18b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-03-23T20:04:11Z",
    "title_canon_sha256": "ab50294693561af2f33f3c7681722755646bcbb76d6a7cc46b9336a8278f9454"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.3950",
    "kind": "arxiv",
    "version": 1
  }
}