Pith Number

pith:3SKVQSDY

pith:2015:3SKVQSDY5VCDXYB3XBLRYLOFOL

not attested not anchored not stored refs pending

Expanding Earth and Static Universe: Two Papers of 1935

Helge Kragh

arxiv:1507.08040 v1 · 2015-07-29 · physics.hist-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3SKVQSDY5VCDXYB3XBLRYLOFOL}

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	2026-05-18T01:36:08.581781Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dc95584878ed443be03bb8571c2dc572e041878ff84df4a7bde7bddddbed5c66

Aliases

arxiv: 1507.08040 · arxiv_version: 1507.08040v1 · doi: 10.48550/arxiv.1507.08040 · pith_short_12: 3SKVQSDY5VCD · pith_short_16: 3SKVQSDY5VCDXYB3 · pith_short_8: 3SKVQSDY

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/3SKVQSDY5VCDXYB3XBLRYLOFOL \
  | 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: dc95584878ed443be03bb8571c2dc572e041878ff84df4a7bde7bddddbed5c66

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "860b7148bf707a371ed27bb88901a99bdbde23835ccc2103d100174eb27b1138",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2015-07-29T07:25:45Z",
    "title_canon_sha256": "45e2a497f7a7268d10a8b8c647d53c5ab947c98ba99491acf18f38dc8fb97dfb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.08040",
    "kind": "arxiv",
    "version": 1
  }
}