Pith Number

pith:4DKOYXRN

pith:2016:4DKOYXRNQNSCEWSDO2J5TCHLOT

not attested not anchored not stored refs pending

On well quasi-order of graph classes under homomorphic image orderings

N. Ruskuc, Sophie Huczynska

arxiv:1611.01200 v3 · 2016-11-03 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4DKOYXRNQNSCEWSDO2J5TCHLOT}

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	2026-05-18T00:48:37.011006Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0d4ec5e2d8364225a437693d988eb74d69816c03b02c8b00668c3545b587753

Aliases

arxiv: 1611.01200 · arxiv_version: 1611.01200v3 · doi: 10.48550/arxiv.1611.01200 · pith_short_12: 4DKOYXRNQNSC · pith_short_16: 4DKOYXRNQNSCEWSD · pith_short_8: 4DKOYXRN

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/4DKOYXRNQNSCEWSDO2J5TCHLOT \
  | 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: e0d4ec5e2d8364225a437693d988eb74d69816c03b02c8b00668c3545b587753

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1103f59c6c5c148e60827d896605275b0b87ddc1ce2ec4885659ed1c7d419eab",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2016-11-03T21:26:49Z",
    "title_canon_sha256": "65305619331422cad08fc9701485a4af7823f083c392155ac36e93c6037eb7c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1611.01200",
    "kind": "arxiv",
    "version": 3
  }
}