Pith Number

pith:UCO36PH4

pith:2019:UCO36PH4S7CDRF7PE7BBBPCCMM

not attested not anchored not stored refs pending

Coherence in Modal Logic

George Metcalfe, Tomasz Kowalski

arxiv:1902.02540 v1 · 2019-02-07 · math.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{UCO36PH4S7CDRF7PE7BBBPCCMM}

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	2026-05-17T23:54:32.986798Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a09dbf3cfc97c43897ef27c210bc42632c4f526b964b7bedd6cce4f020985514

Aliases

arxiv: 1902.02540 · arxiv_version: 1902.02540v1 · doi: 10.48550/arxiv.1902.02540 · pith_short_12: UCO36PH4S7CD · pith_short_16: UCO36PH4S7CDRF7P · pith_short_8: UCO36PH4

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/UCO36PH4S7CDRF7PE7BBBPCCMM \
  | 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: a09dbf3cfc97c43897ef27c210bc42632c4f526b964b7bedd6cce4f020985514

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2c6a00aaf3f9526cb40517afa28f1795cd409aef0d18252d512f2d9523f96bf4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2019-02-07T09:37:10Z",
    "title_canon_sha256": "a3c1eda8bd534562e48fcede96f032afb9b31614736ee1073f3fe1bff7933cb1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.02540",
    "kind": "arxiv",
    "version": 1
  }
}