Pith Number

pith:4IJ2LLVO

pith:2014:4IJ2LLVOW2QWEPETKYQA5VILEA

not attested not anchored not stored refs pending

A tabu search heuristic for the Equitable Coloring Problem

Daniel Sever\'in, Graciela Nasini, Isabel M\'endez D\'iaz

arxiv:1405.7020 v1 · 2014-05-27 · 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{4IJ2LLVOW2QWEPETKYQA5VILEA}

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	2026-05-18T00:31:59.697584Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e213a5aeaeb6a1623c9356200ed50b2023e8b3ab145cac4db847a53e78acd40e

Aliases

arxiv: 1405.7020 · arxiv_version: 1405.7020v1 · doi: 10.48550/arxiv.1405.7020 · pith_short_12: 4IJ2LLVOW2QW · pith_short_16: 4IJ2LLVOW2QWEPET · pith_short_8: 4IJ2LLVO

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/4IJ2LLVOW2QWEPETKYQA5VILEA \
  | 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: e213a5aeaeb6a1623c9356200ed50b2023e8b3ab145cac4db847a53e78acd40e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "602a8d55d947e5936e8e2d070312d297d0621638fbf72029f836241f829123bb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2014-05-27T19:14:10Z",
    "title_canon_sha256": "e3b6cd6274d88b531e7cc0e07e1746732cc066be07b503d3f136e676619d9cf6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1405.7020",
    "kind": "arxiv",
    "version": 1
  }
}