Pith Number

pith:NA3IHRHG

pith:2017:NA3IHRHG6ZPLZ35YV54K24HGSJ

not attested not anchored not stored refs pending

CALF: Categorical Automata Learning Framework

Alexandra Silva, Gerco van Heerdt, Matteo Sammartino

arxiv:1704.05676 v3 · 2017-04-19 · 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{NA3IHRHG6ZPLZ35YV54K24HGSJ}

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	2026-05-18T00:41:44.130962Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

683683c4e6f65ebcefb8af78ad70e69266befdd96801d1fac7d1ced5672468e4

Aliases

arxiv: 1704.05676 · arxiv_version: 1704.05676v3 · doi: 10.48550/arxiv.1704.05676 · pith_short_12: NA3IHRHG6ZPL · pith_short_16: NA3IHRHG6ZPLZ35Y · pith_short_8: NA3IHRHG

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/NA3IHRHG6ZPLZ35YV54K24HGSJ \
  | 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: 683683c4e6f65ebcefb8af78ad70e69266befdd96801d1fac7d1ced5672468e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1d3997b185b2cad867d704c7171cd2441dcd5595189ea10e4f1ea692aecc35a3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2017-04-19T10:08:41Z",
    "title_canon_sha256": "ba17bb89bec32e17e3b3e6b904e20028d9e480b2269113c3e0fb0c82ef416e3f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.05676",
    "kind": "arxiv",
    "version": 3
  }
}