Pith Number

pith:EMIR3A3H

pith:2013:EMIR3A3HFAEUS2EOYZN6L7IFRP

not attested not anchored not stored refs pending

Complexity and polymorphisms for digraph constraint problems under some basic constructions

Marcel Jackson, Todd Niven, Tomasz Kowalski

arxiv:1304.4986 v3 · 2013-04-17 · math.CO · 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{EMIR3A3HFAEUS2EOYZN6L7IFRP}

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	2026-05-18T01:10:43.291203Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

23111d8367280949688ec65be5fd058bc63b22cef55fe5558e5da35b99ec49dc

Aliases

arxiv: 1304.4986 · arxiv_version: 1304.4986v3 · doi: 10.48550/arxiv.1304.4986 · pith_short_12: EMIR3A3HFAEU · pith_short_16: EMIR3A3HFAEUS2EO · pith_short_8: EMIR3A3H

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/EMIR3A3HFAEUS2EOYZN6L7IFRP \
  | 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: 23111d8367280949688ec65be5fd058bc63b22cef55fe5558e5da35b99ec49dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4faa641342a6af602ed8af45adee62a6f2cc14ef19c43d3848f250b8ef0e991d",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-04-17T23:07:08Z",
    "title_canon_sha256": "eb041c4a2c4fb40824b952a553fe351017114ebbe26663db741f38e3130302d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.4986",
    "kind": "arxiv",
    "version": 3
  }
}