Pith Number

pith:UM7EQ4BV

pith:2012:UM7EQ4BVF6WLSR2GLGCE73FFJH

not attested not anchored not stored refs pending

One Tile to Rule Them All: Simulating Any Turing Machine, Tile Assembly System, or Tiling System with a Single Puzzle Piece

Andrew Winslow, Damien Woods, Erik D. Demaine, Martin L. Demaine, Matthew J. Patitz, Robert T. Schweller, S\'andor P. Fekete

arxiv:1212.4756 v1 · 2012-12-19 · cs.DS · 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{UM7EQ4BVF6WLSR2GLGCE73FFJH}

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	2026-05-18T03:38:05.428564Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a33e4870352facb9474659844feca549c5cafb709b99bd7d07272b222de50390

Aliases

arxiv: 1212.4756 · arxiv_version: 1212.4756v1 · doi: 10.48550/arxiv.1212.4756 · pith_short_12: UM7EQ4BVF6WL · pith_short_16: UM7EQ4BVF6WLSR2G · pith_short_8: UM7EQ4BV

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/UM7EQ4BVF6WLSR2GLGCE73FFJH \
  | 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: a33e4870352facb9474659844feca549c5cafb709b99bd7d07272b222de50390

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "655da0aa9e57a239c8fc2c7c6ce105884f690f2ec69e6173086dfc9a10b9f0b6",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.CG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2012-12-19T17:37:27Z",
    "title_canon_sha256": "49e89fede35134092106d992c1480f62f56f463e2e1f50b5ed83f61f93af588b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.4756",
    "kind": "arxiv",
    "version": 1
  }
}