Pith Number

pith:SUTJLLJZ

pith:2015:SUTJLLJZDXTHTRKNUYSL26ACN5

not attested not anchored not stored refs pending

Deciding 4-colorability of planar triangulations

Martin Loebl

arxiv:1505.03962 v3 · 2015-05-15 · math.CO · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SUTJLLJZDXTHTRKNUYSL26ACN5}

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	2026-05-18T01:18:25.477186Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

952695ad391de679c54da624bd78026f45d0c0b608659462f89b57c9033ce1d3

Aliases

arxiv: 1505.03962 · arxiv_version: 1505.03962v3 · doi: 10.48550/arxiv.1505.03962 · pith_short_12: SUTJLLJZDXTH · pith_short_16: SUTJLLJZDXTHTRKN · pith_short_8: SUTJLLJZ

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/SUTJLLJZDXTHTRKNUYSL26ACN5 \
  | 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: 952695ad391de679c54da624bd78026f45d0c0b608659462f89b57c9033ce1d3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "063a23bf3ffca4770807e01386d346691bdb71926d0d016cffe6db0c73cd6e19",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-05-15T05:35:37Z",
    "title_canon_sha256": "2d9918c40b1c555b187504d8bfd6495640cb69b83a3a5420613e7b8be62b80c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.03962",
    "kind": "arxiv",
    "version": 3
  }
}