Pith Number

pith:UMYNFHVB

pith:2015:UMYNFHVBS2MZRU5OVLKBUQEK4G

not attested not anchored not stored refs pending

Algorithms for the minimum sum coloring problem: a review

Jean-Philippe Hamiez, Jin-Kao Hao, Yan Jin

arxiv:1505.00449 v2 · 2015-05-03 · cs.DM · 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{UMYNFHVBS2MZRU5OVLKBUQEK4G}

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	2026-05-18T01:12:32.683129Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a330d29ea1969998d3aeaad41a408ae1a899ec411b4e39e81f42d54947590caf

Aliases

arxiv: 1505.00449 · arxiv_version: 1505.00449v2 · doi: 10.48550/arxiv.1505.00449 · pith_short_12: UMYNFHVBS2MZ · pith_short_16: UMYNFHVBS2MZRU5O · pith_short_8: UMYNFHVB

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/UMYNFHVBS2MZRU5OVLKBUQEK4G \
  | 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: a330d29ea1969998d3aeaad41a408ae1a899ec411b4e39e81f42d54947590caf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "31152d1be89be261ac7b4f471df805a7cb1dd858cc04496d170728753e011fa8",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2015-05-03T16:48:38Z",
    "title_canon_sha256": "089aa0d229417a6e33a01841c185869391673c9440f6cec00cbfc10d3474e1c9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.00449",
    "kind": "arxiv",
    "version": 2
  }
}