Pith Number

pith:2GW6DRPD

pith:2015:2GW6DRPDSTQEQJLYXQYFGDS4MY

not attested not anchored not stored refs pending

Galaxies nurtured by mature black holes

Masahiro Morikawa

arxiv:1508.05436 v2 · 2015-08-21 · 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{2GW6DRPDSTQEQJLYXQYFGDS4MY}

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	2026-05-18T01:22:57.598823Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1ade1c5e394e0482578bc30530e5c6637ea731765e2ad068b07bfc7e3b253ca

Aliases

arxiv: 1508.05436 · arxiv_version: 1508.05436v2 · doi: 10.48550/arxiv.1508.05436 · pith_short_12: 2GW6DRPDSTQE · pith_short_16: 2GW6DRPDSTQEQJLY · pith_short_8: 2GW6DRPD

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/2GW6DRPDSTQEQJLYXQYFGDS4MY \
  | 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: d1ade1c5e394e0482578bc30530e5c6637ea731765e2ad068b07bfc7e3b253ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f22f61a8b6c548e3af26e811b8db6ce6fc80fbbf7b4da3813590abe1a1da8ff4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-08-21T23:31:21Z",
    "title_canon_sha256": "5220bae29dc267eda88848ad0a1402a48ca232451e51b18c510b92c7fde50491"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.05436",
    "kind": "arxiv",
    "version": 2
  }
}