Pith Number

pith:KSMO7S5F

pith:2015:KSMO7S5FLYRFIBTOCY32HTWRP7

not attested not anchored not stored refs pending

First-fit coloring on interval graphs has performance ratio at least 5

David A. Smith, H. A. Kierstead, W. T. Trotter

arxiv:1506.00192 v1 · 2015-05-31 · 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{KSMO7S5FLYRFIBTOCY32HTWRP7}

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	2026-05-18T01:59:55.263471Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5498efcba55e2254066e1637a3ced17ff7d837dd0e9c3a4995b6bc5b1e7d9e8c

Aliases

arxiv: 1506.00192 · arxiv_version: 1506.00192v1 · doi: 10.48550/arxiv.1506.00192 · pith_short_12: KSMO7S5FLYRF · pith_short_16: KSMO7S5FLYRFIBTO · pith_short_8: KSMO7S5F

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/KSMO7S5FLYRFIBTOCY32HTWRP7 \
  | 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: 5498efcba55e2254066e1637a3ced17ff7d837dd0e9c3a4995b6bc5b1e7d9e8c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b7e6f27c251a1933e7893a5d2355a057fd36986104cc8d83512954e117ca56b3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-05-31T03:59:10Z",
    "title_canon_sha256": "3fddf469ab4bfa470ca41f1f00d55389d9303609514602a570c17f46d8fad53b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.00192",
    "kind": "arxiv",
    "version": 1
  }
}