Pith Number

pith:OOEM4BX4

pith:2014:OOEM4BX4IDJQ6MJDLS2YUMSO3W

not attested not anchored not stored refs pending

Dichotomy Theorems for Homomorphism Polynomials of Graph Classes

Christian Engels

arxiv:1412.0423 v1 · 2014-12-01 · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OOEM4BX4IDJQ6MJDLS2YUMSO3W}

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	2026-05-18T02:32:27.906273Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7388ce06fc40d30f31235cb58a324eddb96729e947f4d171ec90eae9e57fb5b3

Aliases

arxiv: 1412.0423 · arxiv_version: 1412.0423v1 · doi: 10.48550/arxiv.1412.0423 · pith_short_12: OOEM4BX4IDJQ · pith_short_16: OOEM4BX4IDJQ6MJD · pith_short_8: OOEM4BX4

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/OOEM4BX4IDJQ6MJDLS2YUMSO3W \
  | 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: 7388ce06fc40d30f31235cb58a324eddb96729e947f4d171ec90eae9e57fb5b3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "725d66afe013331c9e1824e8a5af0d8b4df2e17886df9d291b6b5d6c50e78df7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2014-12-01T11:01:14Z",
    "title_canon_sha256": "5eb3885bb4c5b11787a24e8e9a063e85324b19b393ee0efda2aa62b00d00590d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.0423",
    "kind": "arxiv",
    "version": 1
  }
}