Pith Number

pith:X55MQDSG

pith:2011:X55MQDSGHJKSDEKMXKAICAQT4G

not attested not anchored not stored refs pending

Allan R. Sandage, 18 June 1926 - 13 November 2010

Cambridge), Donald Lynden-Bell (IoA, Francois Schweizer (OCIS, Pasadena)

arxiv:1111.5646 v1 · 2011-11-23 · physics.hist-ph · 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{X55MQDSGHJKSDEKMXKAICAQT4G}

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	2026-05-17T23:47:49.568304Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bf7ac80e463a5521914cba80810213e1affae6da20dc17ee72ddef9003d1d3bd

Aliases

arxiv: 1111.5646 · arxiv_version: 1111.5646v1 · doi: 10.48550/arxiv.1111.5646 · pith_short_12: X55MQDSGHJKS · pith_short_16: X55MQDSGHJKSDEKM · pith_short_8: X55MQDSG

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/X55MQDSGHJKSDEKMXKAICAQT4G \
  | 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: bf7ac80e463a5521914cba80810213e1affae6da20dc17ee72ddef9003d1d3bd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4670e4511f1e1cabe406f38b0cffe2d0fcd1dd40a422afe95913034725c5cb87",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2011-11-23T22:52:03Z",
    "title_canon_sha256": "f12a4295f60e0f5f04b54226d994dcadb3a32e29b545e9a2d26b7bafe10a032e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.5646",
    "kind": "arxiv",
    "version": 1
  }
}