Pith Number

pith:I4W34MLI

pith:2016:I4W34MLIGZFM42DFQJQ7YZCNMY

not attested not anchored not stored refs pending

Relic galaxies: where are they?

Ignacio Trujillo, Luis Peralta de Arriba, Marc Balcells, Mar\'ia Cebri\'an, Vicent Quilis

arxiv:1612.02823 v2 · 2016-12-08 · astro-ph.GA · 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{I4W34MLIGZFM42DFQJQ7YZCNMY}

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	2026-05-18T00:45:58.404510Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

472dbe3168364ace68658261fc644d66310787bcc7208047e790e7e84f200631

Aliases

arxiv: 1612.02823 · arxiv_version: 1612.02823v2 · doi: 10.48550/arxiv.1612.02823 · pith_short_12: I4W34MLIGZFM · pith_short_16: I4W34MLIGZFM42DF · pith_short_8: I4W34MLI

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/I4W34MLIGZFM42DFQJQ7YZCNMY \
  | 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: 472dbe3168364ace68658261fc644d66310787bcc7208047e790e7e84f200631

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a59ca01e25184ba01ff9e601d49c53645c213b406b186e523cb758c91bb363bf",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-12-08T21:00:03Z",
    "title_canon_sha256": "c2983450e80e031a5fbe11834d9392429bf170a1d030b7458445dd299d6202c8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.02823",
    "kind": "arxiv",
    "version": 2
  }
}