Pith Number

pith:6C3NW25N

pith:2017:6C3NW25NDAMOHWFMCVGF5R46LO

not attested not anchored not stored refs pending

Shellability is NP-complete

Martin Tancer, Pavel Pat\'ak, Uli Wagner, Xavier Goaoc, Zuzana Pat\'akov\'a

arxiv:1711.08436 v2 · 2017-11-22 · math.CO · cs.CG · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6C3NW25NDAMOHWFMCVGF5R46LO}

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	2026-05-18T00:25:07.302858Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f0b6db6bad1818e3d8ac154c5ec79e5bab73adf7444f350a6bd4283fdd456fa7

Aliases

arxiv: 1711.08436 · arxiv_version: 1711.08436v2 · doi: 10.48550/arxiv.1711.08436 · pith_short_12: 6C3NW25NDAMO · pith_short_16: 6C3NW25NDAMOHWFM · pith_short_8: 6C3NW25N

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/6C3NW25NDAMOHWFMCVGF5R46LO \
  | 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: f0b6db6bad1818e3d8ac154c5ec79e5bab73adf7444f350a6bd4283fdd456fa7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dc23100eef1b4d569032f4bc1b50e2ba28a561a0d6bf49cee780dae4486d3902",
    "cross_cats_sorted": [
      "cs.CG",
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-11-22T18:33:33Z",
    "title_canon_sha256": "7e51e6da70f8aca88bae5d73a40ab01312e9d57ee9e436f973da02395a9eeb97"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.08436",
    "kind": "arxiv",
    "version": 2
  }
}