Pith Number

pith:WDACYISM

pith:2015:WDACYISMP2PMJECYWU6R4VYDME

not attested not anchored not stored refs pending

The elusive HI-> H2 transition in high-z damped Lyman-alpha systems

P. Noterdaeme, P. Petitjean, R. Srianand

arxiv:1505.04997 v1 · 2015-05-19 · astro-ph.CO · 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{WDACYISMP2PMJECYWU6R4VYDME}

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	2026-05-18T01:55:41.437258Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0c02c224c7e9ec49058b53d1e5703611d34109b2e97b345435b51d1f3a6b959

Aliases

arxiv: 1505.04997 · arxiv_version: 1505.04997v1 · doi: 10.48550/arxiv.1505.04997 · pith_short_12: WDACYISMP2PM · pith_short_16: WDACYISMP2PMJECY · pith_short_8: WDACYISM

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/WDACYISMP2PMJECYWU6R4VYDME \
  | 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: b0c02c224c7e9ec49058b53d1e5703611d34109b2e97b345435b51d1f3a6b959

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "736a484c7684eceeae78612417951bba7e30281e84b095c324a9789e862608b6",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2015-05-19T13:57:55Z",
    "title_canon_sha256": "3117b8b246c660a1365b802bb482ce143111e61250ff2de1ba914d41268cc87f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.04997",
    "kind": "arxiv",
    "version": 1
  }
}