Pith Number

pith:RGKLN2DG

pith:2017:RGKLN2DGOSSUDK4P54F5OMYSR3

not attested not anchored not stored refs pending

The Complexity of Counting Surjective Homomorphisms and Compactions

Jacob Focke, Leslie Ann Goldberg, Stanislav Zivny

arxiv:1706.08786 v5 · 2017-06-27 · cs.CC · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RGKLN2DGOSSUDK4P54F5OMYSR3}

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	2026-05-17T23:42:08.989706Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8994b6e86674a541ab8fef0bd733128edd6eef156ceb6f82449d819bbf375dec

Aliases

arxiv: 1706.08786 · arxiv_version: 1706.08786v5 · doi: 10.48550/arxiv.1706.08786 · pith_short_12: RGKLN2DGOSSU · pith_short_16: RGKLN2DGOSSUDK4P · pith_short_8: RGKLN2DG

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/RGKLN2DGOSSUDK4P54F5OMYSR3 \
  | 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: 8994b6e86674a541ab8fef0bd733128edd6eef156ceb6f82449d819bbf375dec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a24994ee757f8342bb84ed7317085c129540ea09afbab9537fc158501da894e6",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2017-06-27T11:25:11Z",
    "title_canon_sha256": "ba825fa0c3b24592debd440cb6bf2c94cc468e49ce16473ae999cf6339a2e5af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.08786",
    "kind": "arxiv",
    "version": 5
  }
}