Pith Number

pith:33RHWY37

pith:2013:33RHWY37MLIDMT25NSVJHGLCZ2

not attested not anchored not stored refs pending

Fixed-Parameter and Approximation Algorithms: A New Look

Guy Kortsarz, MohammadTaghi Hajiaghayi, Rajesh Chitnis

arxiv:1308.3520 v1 · 2013-08-15 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{33RHWY37MLIDMT25NSVJHGLCZ2}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T03:15:44.689589Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dee27b637f62d0364f5d6caa939962ce9b4ec9507985028055e0870d53ef473e

Aliases

arxiv: 1308.3520 · arxiv_version: 1308.3520v1 · doi: 10.48550/arxiv.1308.3520 · pith_short_12: 33RHWY37MLID · pith_short_16: 33RHWY37MLIDMT25 · pith_short_8: 33RHWY37

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/33RHWY37MLIDMT25NSVJHGLCZ2 \
  | 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: dee27b637f62d0364f5d6caa939962ce9b4ec9507985028055e0870d53ef473e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8195217016cecdbcd38466a9fc08af950efe5ce30ae29b2dfb89c8a58527a0f9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2013-08-15T22:17:59Z",
    "title_canon_sha256": "8bf0b65b0f0393af08257e062cfd512c826538f65514991d6ccc7d4488db8800"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.3520",
    "kind": "arxiv",
    "version": 1
  }
}