Pith Number

pith:ZCFBPT3I

pith:2015:ZCFBPT3IQ2FYDSNDDIH3RRGZ5N

not attested not anchored not stored refs pending

Tree Automata and Tree Grammars

Joost Engelfriet

arxiv:1510.02036 v1 · 2015-10-07 · cs.FL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZCFBPT3IQ2FYDSNDDIH3RRGZ5N}

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	2026-05-18T01:30:49.839620Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c88a17cf68868b81c9a31a0fb8c4d9eb44e7e151554552871460c33c6be150dc

Aliases

arxiv: 1510.02036 · arxiv_version: 1510.02036v1 · doi: 10.48550/arxiv.1510.02036 · pith_short_12: ZCFBPT3IQ2FY · pith_short_16: ZCFBPT3IQ2FYDSND · pith_short_8: ZCFBPT3I

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/ZCFBPT3IQ2FYDSNDDIH3RRGZ5N \
  | 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: c88a17cf68868b81c9a31a0fb8c4d9eb44e7e151554552871460c33c6be150dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42340ba544dd348b4acf489bec6ef1ac0fe60e2d2f4a5dbf26227589f908dec3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2015-10-07T17:33:06Z",
    "title_canon_sha256": "089608820fb89da02a4626b4fb97b1411639cde30536271a0405b00a3035b078"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.02036",
    "kind": "arxiv",
    "version": 1
  }
}