Pith Number

pith:H4KOFKPD

pith:2023:H4KOFKPD5G6EJRQCROURS6WRN2

not attested not anchored not stored refs pending

Polynomial-delay generation of functional digraphs up to isomorphism

Antonio E. Porreca, Ekaterina Timofeeva, Oscar Defrain

arxiv:2302.13832 v3 · 2023-02-27 · cs.DS · cs.DM · math.CO · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{H4KOFKPD5G6EJRQCROURS6WRN2}

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	2026-07-05T09:01:23.624914Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f14e2a9e3e9bc44c6028ba9197ad16eb0242f184cd7ea24d3980b1cadbb0473

Aliases

arxiv: 2302.13832 · arxiv_version: 2302.13832v3 · doi: 10.48550/arxiv.2302.13832 · pith_short_12: H4KOFKPD5G6E · pith_short_16: H4KOFKPD5G6EJRQC · pith_short_8: H4KOFKPD

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/H4KOFKPD5G6EJRQCROURS6WRN2 \
  | 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: 3f14e2a9e3e9bc44c6028ba9197ad16eb0242f184cd7ea24d3980b1cadbb0473

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1c6116f1bd587b9439da32e7203a7afa20a1fae74393eb6899e386b2d933e33e",
    "cross_cats_sorted": [
      "cs.DM",
      "math.CO",
      "math.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2023-02-27T14:35:18Z",
    "title_canon_sha256": "4ceeed94454ec59d4890c9bebe1f0cc73a5096ca51f5054c6ff50b20abe89cf0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2302.13832",
    "kind": "arxiv",
    "version": 3
  }
}