Pith Number

pith:R35EX66U

pith:2016:R35EX66UTXFSS7BUZPMXT2RYFD

not attested not anchored not stored refs pending

Even $1 \times n$ Edge-Matching and Jigsaw Puzzles are Really Hard

Adam Hesterberg, Anak Yodpinyanee, Erik D. Demaine, Jeffrey Bosboom, Martin L. Demaine, Pasin Manurangsi

arxiv:1701.00146 v1 · 2016-12-31 · cs.CC · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R35EX66UTXFSS7BUZPMXT2RYFD}

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	2026-05-18T00:53:36.248412Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8efa4bfbd49dcb297c34cbd979ea3828c97248cba32095510310037920eebeff

Aliases

arxiv: 1701.00146 · arxiv_version: 1701.00146v1 · doi: 10.48550/arxiv.1701.00146 · pith_short_12: R35EX66UTXFS · pith_short_16: R35EX66UTXFSS7BU · pith_short_8: R35EX66U

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/R35EX66UTXFSS7BUZPMXT2RYFD \
  | 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: 8efa4bfbd49dcb297c34cbd979ea3828c97248cba32095510310037920eebeff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f1ce07dea28f6226b8de39ff74fc743a0822a8aae744b5a55b4776e792838518",
    "cross_cats_sorted": [
      "cs.CG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2016-12-31T17:05:53Z",
    "title_canon_sha256": "4dc1517e6bf0b1edc05e90d77a97bbd560e34bc42671037beb1db77856e473eb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.00146",
    "kind": "arxiv",
    "version": 1
  }
}