Pith Number

pith:77WEOX6F

pith:2018:77WEOX6FWCWLVACFK3P5OIDYZV

not attested not anchored not stored refs pending

An enhanced formulation for solving graph coloring problems with the Douglas-Rachford algorithm

F.J. Arag\'on Artacho, R. Campoy, V. Elser

arxiv:1808.01022 v1 · 2018-08-02 · math.OC · 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{77WEOX6FWCWLVACFK3P5OIDYZV}

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	2026-05-18T00:08:59.319513Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ffec475fc5b0acba804556dfd72078cd53fd3f1a99cc57b4dcf271a9072b0e1f

Aliases

arxiv: 1808.01022 · arxiv_version: 1808.01022v1 · doi: 10.48550/arxiv.1808.01022 · pith_short_12: 77WEOX6FWCWL · pith_short_16: 77WEOX6FWCWLVACF · pith_short_8: 77WEOX6F

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/77WEOX6FWCWLVACFK3P5OIDYZV \
  | 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: ffec475fc5b0acba804556dfd72078cd53fd3f1a99cc57b4dcf271a9072b0e1f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "79488ce71f89e5276a5f1a976bd1bed7175cce95b2b5d8e661ea344f0d146279",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-08-02T20:56:46Z",
    "title_canon_sha256": "ec10a50962eb44bf1a83e865f8034557ae1a6cb2c598e0fcfe9fef9119c8100c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.01022",
    "kind": "arxiv",
    "version": 1
  }
}