Pith Number

pith:FDFK5E3G

pith:2017:FDFK5E3GNYL7QY4UMWUR22KEIU

not attested not anchored not stored refs pending

On the Impossibility of Supersized Machines

Anders Sandberg, Andrew Snyder-Beattie, Ben Garfinkel, Carrick Flynn, Daniel Filan, Jelena Luketina, Max Tegmark, Michael Page, Miles Brundage

arxiv:1703.10987 v1 · 2017-03-31 · cs.CY · physics.pop-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{FDFK5E3GNYL7QY4UMWUR22KEIU}

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	2026-05-18T00:47:32.127993Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28caae93666e17f8639465a91d69444515b93829308067fe3733048596f8963e

Aliases

arxiv: 1703.10987 · arxiv_version: 1703.10987v1 · doi: 10.48550/arxiv.1703.10987 · pith_short_12: FDFK5E3GNYL7 · pith_short_16: FDFK5E3GNYL7QY4U · pith_short_8: FDFK5E3G

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/FDFK5E3GNYL7QY4UMWUR22KEIU \
  | 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: 28caae93666e17f8639465a91d69444515b93829308067fe3733048596f8963e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2434c7885ae69cf5424451689635698d4c42f4622de2ac1a95c72f65abc4c0bc",
    "cross_cats_sorted": [
      "physics.pop-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2017-03-31T17:14:39Z",
    "title_canon_sha256": "791b6bb2b6f7bd558c4f062b9a9b6fd54d5235c84b3ef7ceed748240f1fb0a68"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.10987",
    "kind": "arxiv",
    "version": 1
  }
}