Pith Number

pith:WI6EOFBK

pith:2009:WI6EOFBKCJS3PWSWERU66KYDUI

not attested not anchored not stored refs pending

Evolution of the Halpha luminosity function

(2) Brown University), Daniel G. Fabricant (1), Eduard Westra (1), Ian Dell'Antonio (2) ((1) Smithsonian Astrophysical Observatory, Margaret J. Geller (1), Michael J. Kurtz (1)

arxiv:0911.0417 v1 · 2009-11-03 · 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{WI6EOFBKCJS3PWSWERU66KYDUI}

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	2026-05-18T02:34:12.135974Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b23c47142a1265b7da562469ef2b03a2180e7e27ed02e292b322404729119e98

Aliases

arxiv: 0911.0417 · arxiv_version: 0911.0417v1 · doi: 10.48550/arxiv.0911.0417 · pith_short_12: WI6EOFBKCJS3 · pith_short_16: WI6EOFBKCJS3PWSW · pith_short_8: WI6EOFBK

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/WI6EOFBKCJS3PWSWERU66KYDUI \
  | 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: b23c47142a1265b7da562469ef2b03a2180e7e27ed02e292b322404729119e98

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1be9d166ee10c71818c4fcdd088d4813a14c69bfa76623b7b873c28edbec5069",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-11-03T14:05:41Z",
    "title_canon_sha256": "1a79546671e40dbfea737ca3db952648beeb8f6e0a6b45fa4553bcfc3d2a0fe1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.0417",
    "kind": "arxiv",
    "version": 1
  }
}