Pith Number

pith:AAFWGAQ3

pith:2021:AAFWGAQ32XDJUJOQUQYCBFWTPO

not attested not anchored not stored refs pending

Close relatives (of Feedback Vertex Set), revisited

Hugo Jacob, Marcin Pilipczuk, Oscar Defrain, Thomas Bellitto

arxiv:2106.16015 v1 · 2021-06-30 · cs.DM · cs.CC · cs.DS · 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{AAFWGAQ32XDJUJOQUQYCBFWTPO}

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	2026-07-05T02:54:02.412780Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

000b63021bd5c69a25d0a4302096d37ba5c1cbd1cf3109ffcb6f22ff6d9a0a75

Aliases

arxiv: 2106.16015 · arxiv_version: 2106.16015v1 · doi: 10.48550/arxiv.2106.16015 · pith_short_12: AAFWGAQ32XDJ · pith_short_16: AAFWGAQ32XDJUJOQ · pith_short_8: AAFWGAQ3

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/AAFWGAQ32XDJUJOQUQYCBFWTPO \
  | 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: 000b63021bd5c69a25d0a4302096d37ba5c1cbd1cf3109ffcb6f22ff6d9a0a75

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f0e4706f2524b188e0bd8319b14038ae1e62d82d9778f53c52fcd81ebadc554",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DS",
      "math.CO"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2021-06-30T12:30:32Z",
    "title_canon_sha256": "dfb7218c6a0b1e45593f7dd87a873a8482be6081076d6a680b25a49843e4f983"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2106.16015",
    "kind": "arxiv",
    "version": 1
  }
}