Pith Number

pith:R5SCXJNP

pith:2021:R5SCXJNP3ACSDTONKGP2SELDEX

not attested not anchored not stored refs pending

An Impossible Asylum

Alexander Bentkamp, Jeremy Avigad, Marijn Heule, Seulkee Baek, Wojciech Nawrocki

arxiv:2112.02142 v2 · 2021-12-03 · math.LO · cs.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R5SCXJNP3ACSDTONKGP2SELDEX}

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	2026-07-05T04:17:18.891023Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f642ba5afd80521cdcd519fa9116325e287dc01879923c2909763d0715d41fa

Aliases

arxiv: 2112.02142 · arxiv_version: 2112.02142v2 · doi: 10.48550/arxiv.2112.02142 · pith_short_12: R5SCXJNP3ACS · pith_short_16: R5SCXJNP3ACSDTON · pith_short_8: R5SCXJNP

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/R5SCXJNP3ACSDTONKGP2SELDEX \
  | 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: 8f642ba5afd80521cdcd519fa9116325e287dc01879923c2909763d0715d41fa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0725054995dda2f5691a83cfcb08504604aaaca87d7a0b9f9ea63f0dad2b52d8",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2021-12-03T19:55:54Z",
    "title_canon_sha256": "2aba46e7bcaae1239760b808010c9e0fa37216bc31e76d0b39373a57d241f01d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2112.02142",
    "kind": "arxiv",
    "version": 2
  }
}