Pith Number

pith:SPTKIWGN

pith:2012:SPTKIWGNGFMDFIZQGSLQXXKU5N

not attested not anchored not stored refs pending

Picture-Hanging Puzzles

Erik D. Demaine, Joseph S. B. Mitchell, Martin L. Demaine, Mihai Patrascu, Ronald L. Rivest, Yair N. Minsky

arxiv:1203.3602 v2 · 2012-03-16 · cs.DS · math.GN · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SPTKIWGNGFMDFIZQGSLQXXKU5N}

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	2026-05-18T02:53:15.652728Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93e6a458cd315832a33034970bdd54eb775f3b7e6feaf574390797da459ac6f5

Aliases

arxiv: 1203.3602 · arxiv_version: 1203.3602v2 · doi: 10.48550/arxiv.1203.3602 · pith_short_12: SPTKIWGNGFMD · pith_short_16: SPTKIWGNGFMDFIZQ · pith_short_8: SPTKIWGN

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/SPTKIWGNGFMDFIZQGSLQXXKU5N \
  | 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: 93e6a458cd315832a33034970bdd54eb775f3b7e6feaf574390797da459ac6f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3374dda44857b948135ab3fa03ab2ea90b06d8125d4660e34aa9cecfbfdf00b1",
    "cross_cats_sorted": [
      "math.GN",
      "math.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2012-03-16T02:05:19Z",
    "title_canon_sha256": "a8c5b506ecb4c5179b45e3fc1867587e2a3ce3b069b72b5ca1f53314bff4c5c0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.3602",
    "kind": "arxiv",
    "version": 2
  }
}