Pith Number

pith:EQIKI3S2

pith:2019:EQIKI3S2YMUUPD6Y6HFUXT5IO3

not attested not anchored not stored refs pending

Galaxies with monstrous black holes in galaxy cluster environments

Christopher Barber, Claudio Dalla Vecchia, David J. Barnes, Joop Schaye, Lieke A. C. van Son, Robert A. Crain, Scott T. Kay, Tom Theuns, Yannick M. Bahe

arxiv:1901.03156 v1 · 2019-01-10 · 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{EQIKI3S2YMUUPD6Y6HFUXT5IO3}

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	2026-05-17T23:51:13.871256Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2410a46e5ac329478fd8f1cb4bcfa876d70a55796f753e1269ec06ff012fee9d

Aliases

arxiv: 1901.03156 · arxiv_version: 1901.03156v1 · doi: 10.48550/arxiv.1901.03156 · pith_short_12: EQIKI3S2YMUU · pith_short_16: EQIKI3S2YMUUPD6Y · pith_short_8: EQIKI3S2

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/EQIKI3S2YMUUPD6Y6HFUXT5IO3 \
  | 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: 2410a46e5ac329478fd8f1cb4bcfa876d70a55796f753e1269ec06ff012fee9d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "316f878c06c9c2938cf7867edd482b0b15888859ba156558920da00c869b01cf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-01-10T13:42:41Z",
    "title_canon_sha256": "2ea42c0d287a004527428b75a64a8a0cd22fa511c7ae76c45c1f31e89c1a00b3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.03156",
    "kind": "arxiv",
    "version": 1
  }
}