Pith Number

pith:J3Z25MED

pith:2020:J3Z25MED5CPY7FA23ZJ2COZ5TM

not attested not anchored not stored refs pending

A Categorical Framework for Learning Generalised Tree Automata

Alexandra Silva, Gerco van Heerdt, Jurriaan Rot, Matteo Sammartino, Tobias Kapp\'e

arxiv:2001.05786 v2 · 2020-01-16 · 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{J3Z25MED5CPY7FA23ZJ2COZ5TM}

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	2026-07-05T05:38:06.515066Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4ef3aeb083e89f8f941ade53a13b3d9b0c0217984fb29af6f548df519d084556

Aliases

arxiv: 2001.05786 · arxiv_version: 2001.05786v2 · doi: 10.48550/arxiv.2001.05786 · pith_short_12: J3Z25MED5CPY · pith_short_16: J3Z25MED5CPY7FA2 · pith_short_8: J3Z25MED

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/J3Z25MED5CPY7FA23ZJ2COZ5TM \
  | 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: 4ef3aeb083e89f8f941ade53a13b3d9b0c0217984fb29af6f548df519d084556

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "957f6abeafdf2913ad23b119822b922866d80cdd7be436a76c6a17fe068b4f9d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2020-01-16T13:20:43Z",
    "title_canon_sha256": "4b51c6c9f3c939df86111f6893568659371c20dffd16e713764854f7ae6dd499"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2001.05786",
    "kind": "arxiv",
    "version": 2
  }
}