Pith Number

pith:QWR4GTMT

pith:2022:QWR4GTMTC3M6VNUJOK63CY7JTM

not attested not anchored not stored refs pending

1-Extendability of independent sets

Anthony Busson, Carl Feghali, Pierre Berg\'e, R\'emi Watrigant

arxiv:2204.05809 v1 · 2022-04-12 · cs.CC · 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{QWR4GTMTC3M6VNUJOK63CY7JTM}

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	2026-07-05T04:14:02.587977Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85a3c34d9316d9eab68972bdb163e99b0b81efd1535a3605a310fc2b9b20d5c0

Aliases

arxiv: 2204.05809 · arxiv_version: 2204.05809v1 · doi: 10.48550/arxiv.2204.05809 · pith_short_12: QWR4GTMTC3M6 · pith_short_16: QWR4GTMTC3M6VNUJ · pith_short_8: QWR4GTMT

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/QWR4GTMTC3M6VNUJOK63CY7JTM \
  | 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: 85a3c34d9316d9eab68972bdb163e99b0b81efd1535a3605a310fc2b9b20d5c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d5f6f8af1e031cffad09ed86b4602041b9036025cfed8351830c7dd2a54aa40d",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2022-04-12T13:48:28Z",
    "title_canon_sha256": "1f49df3ac7349af521a5aeb4252824a965cda80e6af4dcca0d1ebd731b15bca7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2204.05809",
    "kind": "arxiv",
    "version": 1
  }
}