Pith Number

pith:7CVLBCKY

pith:2012:7CVLBCKY5WEJRYDIGOMNBUO3U6

not attested not anchored not stored refs pending

Who discovered Universe expansion?

Ian Steer

arxiv:1212.1359 v1 · 2012-12-06 · physics.hist-ph · astro-ph.CO · astro-ph.IM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7CVLBCKY5WEJRYDIGOMNBUO3U6}

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	2026-05-18T03:39:04.151888Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8aab08958ed8898e0683398d0d1dba783cf4ce5f63c8b7a7754f45342171cf7

Aliases

arxiv: 1212.1359 · arxiv_version: 1212.1359v1 · doi: 10.48550/arxiv.1212.1359 · pith_short_12: 7CVLBCKY5WEJ · pith_short_16: 7CVLBCKY5WEJRYDI · pith_short_8: 7CVLBCKY

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/7CVLBCKY5WEJRYDIGOMNBUO3U6 \
  | 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: f8aab08958ed8898e0683398d0d1dba783cf4ce5f63c8b7a7754f45342171cf7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4a39fd789ff1c444e01b5f5047410d4889b2437a6adc8b94b96fe92017f43f1e",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2012-12-06T16:01:45Z",
    "title_canon_sha256": "ac7954cedf3003bb1c978c9acfbd2c7dfe8cb30c419bcd109bd85b7438e3cba5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.1359",
    "kind": "arxiv",
    "version": 1
  }
}