Pith Number

pith:FHQ4EHGK

pith:2019:FHQ4EHGKRGCDNFJPVNXORXUD2P

not attested not anchored not stored refs pending

Implicit Recursive Characteristics of STOP

Mike H. Ji

arxiv:1908.06601 v2 · 2019-08-19 · cs.PL · cs.CL · cs.FL · 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{FHQ4EHGKRGCDNFJPVNXORXUD2P}

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	2026-07-04T23:58:58.607759Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29e1c21cca898436952fab6ee8de83d3ece9e383da6a48b09ea37fccd99ad366

Aliases

arxiv: 1908.06601 · arxiv_version: 1908.06601v2 · doi: 10.48550/arxiv.1908.06601 · pith_short_12: FHQ4EHGKRGCD · pith_short_16: FHQ4EHGKRGCDNFJP · pith_short_8: FHQ4EHGK

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/FHQ4EHGKRGCDNFJPVNXORXUD2P \
  | 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: 29e1c21cca898436952fab6ee8de83d3ece9e383da6a48b09ea37fccd99ad366

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "07e8ebbd650b99ee2f150595bd49ce3f437dfdc7a08860fc435878853d89879d",
    "cross_cats_sorted": [
      "cs.CL",
      "cs.FL",
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2019-08-19T05:43:13Z",
    "title_canon_sha256": "e217ac4080c7f16b0bd624dd7823a23e43817ad1a3dceeb37ed4043edc9cc766"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.06601",
    "kind": "arxiv",
    "version": 2
  }
}