Pith Number

pith:B57IJZFH

pith:2018:B57IJZFHLZ3DGH4YVIJTDBIIXJ

not attested not anchored not stored refs pending

A note on the problem of prisoners and hats

Petr Glivick\'y

arxiv:1801.01184 v1 · 2018-01-03 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{B57IJZFHLZ3DGH4YVIJTDBIIXJ}

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	2026-05-18T00:26:42.888913Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f7e84e4a75e76331f98aa13318508ba4353032997c5284f474ef9a905d4ab11

Aliases

arxiv: 1801.01184 · arxiv_version: 1801.01184v1 · doi: 10.48550/arxiv.1801.01184 · pith_short_12: B57IJZFHLZ3D · pith_short_16: B57IJZFHLZ3DGH4Y · pith_short_8: B57IJZFH

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/B57IJZFHLZ3DGH4YVIJTDBIIXJ \
  | 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: 0f7e84e4a75e76331f98aa13318508ba4353032997c5284f474ef9a905d4ab11

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fbf4a87cdb53e946aeccd66dc1250c705699f1d94f13eff3a80a24758e0f0e20",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-01-03T21:37:02Z",
    "title_canon_sha256": "68ccef8b57eaa0dc873b150392d29e01532dcd4c0a91ddd6e0d6329d192e21ba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.01184",
    "kind": "arxiv",
    "version": 1
  }
}