Pith Number

pith:QM2PFX2S

pith:2019:QM2PFX2SNDS3VH4C6M33JHT26Y

not attested not anchored not stored refs pending

Reinventing the Zel'Dovich Wheel

Cisco Gooding, Silke Weinfurtner, William G. Unruh

arxiv:1907.08688 v2 · 2019-07-19 · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QM2PFX2SNDS3VH4C6M33JHT26Y}

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	2026-07-05T01:14:26.679481Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8334f2df5268e5ba9f82f337b49e7af62e6f7eac26c31945181faccd74ae9f85

Aliases

arxiv: 1907.08688 · arxiv_version: 1907.08688v2 · doi: 10.48550/arxiv.1907.08688 · pith_short_12: QM2PFX2SNDS3 · pith_short_16: QM2PFX2SNDS3VH4C · pith_short_8: QM2PFX2S

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/QM2PFX2SNDS3VH4C6M33JHT26Y \
  | 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: 8334f2df5268e5ba9f82f337b49e7af62e6f7eac26c31945181faccd74ae9f85

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "98d58491d6c0e0cb07b2598b78c598f4c936e847425ae423cca35ee5b62551fd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2019-07-19T20:40:29Z",
    "title_canon_sha256": "19a8c4e8c2d360b4afd2a6ed8a6cd083114c2ee4771046398458cc0d5315179c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.08688",
    "kind": "arxiv",
    "version": 2
  }
}