Pith Number

pith:FR2D34RH

pith:2013:FR2D34RHJMKNSMJ2XSE56TBZAF

not attested not anchored not stored refs pending

The collapse of supertasks

Gustavo E. Romero

arxiv:1309.0144 v1 · 2013-08-31 · physics.hist-ph · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FR2D34RHJMKNSMJ2XSE56TBZAF}

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	2026-05-18T03:14:28.725399Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c743df2274b14d9313abc89df4c39016e4a64f324a4f5d66ec9d25b13a84709

Aliases

arxiv: 1309.0144 · arxiv_version: 1309.0144v1 · doi: 10.48550/arxiv.1309.0144 · pith_short_12: FR2D34RHJMKN · pith_short_16: FR2D34RHJMKNSMJ2 · pith_short_8: FR2D34RH

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/FR2D34RHJMKNSMJ2XSE56TBZAF \
  | 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: 2c743df2274b14d9313abc89df4c39016e4a64f324a4f5d66ec9d25b13a84709

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "00323777b2d92c38065a2a7e1d59220c2e455a0e8f06149e2f2d247d3b20d577",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2013-08-31T18:51:52Z",
    "title_canon_sha256": "7a72dd56738587287c807955894d7545c2b2c632f962a768ce42055127abaef7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.0144",
    "kind": "arxiv",
    "version": 1
  }
}