Pith Number

pith:FWIJ7ALA

pith:2017:FWIJ7ALAMZJGKGEHYXGYFAHW4I

not attested not anchored not stored refs pending

Complexity of Correspondence Homomorphisms

Pavol Hell, Tomas Feder

arxiv:1703.05881 v2 · 2017-03-17 · cs.DM · cs.CC · 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{FWIJ7ALAMZJGKGEHYXGYFAHW4I}

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	2026-05-18T00:19:53.748831Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2d909f81606652651887c5cd8280f6e22afecfe5e4e947ed366ed774469ca35f

Aliases

arxiv: 1703.05881 · arxiv_version: 1703.05881v2 · doi: 10.48550/arxiv.1703.05881 · pith_short_12: FWIJ7ALAMZJG · pith_short_16: FWIJ7ALAMZJGKGEH · pith_short_8: FWIJ7ALA

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/FWIJ7ALAMZJGKGEHYXGYFAHW4I \
  | 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: 2d909f81606652651887c5cd8280f6e22afecfe5e4e947ed366ed774469ca35f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "794283eae53b21ebc0b41f6692babc6b69990f6bc0d4f31b5c51a45969cd3e79",
    "cross_cats_sorted": [
      "cs.CC",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2017-03-17T03:58:22Z",
    "title_canon_sha256": "e1173c1a7a53c5138d4d32bbcc5a2298ec9ff2665726fc498938b999ae762745"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.05881",
    "kind": "arxiv",
    "version": 2
  }
}