Pith Number

pith:2LDKDPSI

pith:2011:2LDKDPSIG7JJG7TM5JJXHUECPQ

not attested not anchored not stored refs pending

Secular evolution and a non-evolving black hole to galaxy mass ratio in the last 7 Gyr

Andrea Merloni, Angela Bongiorno, Anton M. Koekemoer, Chris D. Impey, Jonathan R. Trump, Katherine J. Inskip, Knud Jahnke, Mara Salvato, Mauricio Cisternas

arxiv:1109.4633 v1 · 2011-09-21 · 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{2LDKDPSIG7JJG7TM5JJXHUECPQ}

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	2026-05-18T04:11:08.174416Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d2c6a1be4837d2937e6cea5373d0827c350078e4652155f001b2a164b670461c

Aliases

arxiv: 1109.4633 · arxiv_version: 1109.4633v1 · doi: 10.48550/arxiv.1109.4633 · pith_short_12: 2LDKDPSIG7JJ · pith_short_16: 2LDKDPSIG7JJG7TM · pith_short_8: 2LDKDPSI

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/2LDKDPSIG7JJG7TM5JJXHUECPQ \
  | 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: d2c6a1be4837d2937e6cea5373d0827c350078e4652155f001b2a164b670461c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "77dec8a710e5662bfca27dc354712a7e3e872aa2316f7215a34c9932493e968d",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-09-21T20:00:00Z",
    "title_canon_sha256": "34294157dd04d9d955672d5b143699dad80b3d1fa64b62b6a04f56fd65d67916"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.4633",
    "kind": "arxiv",
    "version": 1
  }
}