Pith Number

pith:Z7YTEPZA

pith:2012:Z7YTEPZA4M7ZMNEX6Q7WWQMGCQ

not attested not anchored not stored refs pending

Spanning trees and the complexity of flood-filling games

Alexander Scott, Kitty Meeks

arxiv:1203.2538 v3 · 2012-03-12 · 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{Z7YTEPZA4M7ZMNEX6Q7WWQMGCQ}

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	2026-05-18T03:21:08.686376Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cff1323f20e33f963497f43f6b41861417138023e8d2fb95056f0ed1bbda3ffc

Aliases

arxiv: 1203.2538 · arxiv_version: 1203.2538v3 · doi: 10.48550/arxiv.1203.2538 · pith_short_12: Z7YTEPZA4M7Z · pith_short_16: Z7YTEPZA4M7ZMNEX · pith_short_8: Z7YTEPZA

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/Z7YTEPZA4M7ZMNEX6Q7WWQMGCQ \
  | 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: cff1323f20e33f963497f43f6b41861417138023e8d2fb95056f0ed1bbda3ffc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e73ea6572bc37d00a1ece32fef223d495210fcc6841640121ec9c4c1fcbd8ccd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2012-03-12T16:29:42Z",
    "title_canon_sha256": "1813553bf126b83614c0799ea7c3bbd3d4a67efbd0c519ceddff61222585855b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.2538",
    "kind": "arxiv",
    "version": 3
  }
}