Pith Number

pith:EWO2VRTC

pith:1994:EWO2VRTCFF7HOSLQWHFRDZ7NO7

not attested not anchored not stored refs pending

Algorithms for learning and teaching sets of vertices in graphs

Lane H. Clark, Michael R. Fellows, Patricia A. Evans, Walter D. Wallis

arxiv:math/9411223 v1 · 1994-11-22 · 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{EWO2VRTCFF7HOSLQWHFRDZ7NO7}

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	2026-05-18T01:05:50.847459Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

259daac662297e774970b1cb11e7ed77c82b9d6790a9b863dcd09f19ac7cc1cd

Aliases

arxiv: math/9411223 · arxiv_version: math/9411223v1 · doi: 10.48550/arxiv.math/9411223 · pith_short_12: EWO2VRTCFF7H · pith_short_16: EWO2VRTCFF7HOSLQ · pith_short_8: EWO2VRTC

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/EWO2VRTCFF7HOSLQWHFRDZ7NO7 \
  | 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: 259daac662297e774970b1cb11e7ed77c82b9d6790a9b863dcd09f19ac7cc1cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c06ff85ef8b4c4740841fc364224fe2d9c4d621c5694cb81e881ae837bffddc2",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.CO",
    "submitted_at": "1994-11-22T00:00:00Z",
    "title_canon_sha256": "1afe71b454fc4cbab966fca79011644132b9d218d188c9e6824e0372ba67ff23"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9411223",
    "kind": "arxiv",
    "version": 1
  }
}