Pith Number

pith:RZ46U6EA

pith:2018:RZ46U6EA27CEUPWIY7X6B6KWAE

not attested not anchored not stored refs pending

Heuristic algorithms for the min-max edge 2-coloring problem

Alexandru Popa, Radu Stefan Mincu

arxiv:1801.02239 v2 · 2018-01-07 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RZ46U6EA27CEUPWIY7X6B6KWAE}

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	2026-05-18T00:03:56.563194Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e79ea7880d7c44a3ec8c7efe0f956013e5b50970bbc1ff0ec7eaf970c67ce59

Aliases

arxiv: 1801.02239 · arxiv_version: 1801.02239v2 · doi: 10.48550/arxiv.1801.02239 · pith_short_12: RZ46U6EA27CE · pith_short_16: RZ46U6EA27CEUPWI · pith_short_8: RZ46U6EA

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/RZ46U6EA27CEUPWIY7X6B6KWAE \
  | 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: 8e79ea7880d7c44a3ec8c7efe0f956013e5b50970bbc1ff0ec7eaf970c67ce59

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "54c6af77c3020af87d906f235871616ecce3792e5c96e568ae3fbac0bea4e992",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2018-01-07T20:01:33Z",
    "title_canon_sha256": "6cb8924eac9beb41786b7ab296b833adb9754f5a6a924f9b4becf4d1bef77e1c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.02239",
    "kind": "arxiv",
    "version": 2
  }
}