Pith Number

pith:PLPPE47S

pith:2012:PLPPE47SB5V6TD6QQHSIFBCS4S

not attested not anchored not stored refs pending

Quasi-Steady-State and Related Cosmological Models: A Historical Review

Helge Kragh

arxiv:1201.3449 v1 · 2012-01-17 · physics.hist-ph · 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{PLPPE47SB5V6TD6QQHSIFBCS4S}

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	2026-05-18T04:04:29.265244Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7adef273f20f6be98fd081e4828452e4a4f74cca95e02d364c46f50892410efa

Aliases

arxiv: 1201.3449 · arxiv_version: 1201.3449v1 · doi: 10.48550/arxiv.1201.3449 · pith_short_12: PLPPE47SB5V6 · pith_short_16: PLPPE47SB5V6TD6Q · pith_short_8: PLPPE47S

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/PLPPE47SB5V6TD6QQHSIFBCS4S \
  | 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: 7adef273f20f6be98fd081e4828452e4a4f74cca95e02d364c46f50892410efa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "91f1687475b90de85322f7f932938e6247bfd44e5a5dcd782e83001bc7163702",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2012-01-17T08:07:32Z",
    "title_canon_sha256": "35145c93262728f08932f87bc303944c807ddb6a7ec626a743682f71c3a598a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.3449",
    "kind": "arxiv",
    "version": 1
  }
}