Pith Number

pith:DYTCPRQS

pith:2006:DYTCPRQSFXX72VRYHMJ3F2BTR5

not attested not anchored not stored refs pending

Locked and Unlocked Chains of Planar Shapes

Ares Ribo, Erik D. Demaine, Guenter Rote, Joseph S. B. Mitchell, Martin L. Demaine, Robert Connelly, Sandor P. Fekete, Stefan Langerman

arxiv:cs/0604022 v4 · 2006-04-06 · 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{DYTCPRQSFXX72VRYHMJ3F2BTR5}

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	2026-05-18T02:26:53.289027Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1e2627c6122deffd56383b13b2e8338f426771351029e1290330234d3825f3a5

Aliases

arxiv: cs/0604022 · arxiv_version: cs/0604022v4 · doi: 10.48550/arxiv.cs/0604022 · pith_short_12: DYTCPRQSFXX7 · pith_short_16: DYTCPRQSFXX72VRY · pith_short_8: DYTCPRQS

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/DYTCPRQSFXX72VRYHMJ3F2BTR5 \
  | 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: 1e2627c6122deffd56383b13b2e8338f426771351029e1290330234d3825f3a5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8356aa7fe18a1d75e394ac17e6aee6ff8e11202f85cb41de29e2ba3be2e7e27e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2006-04-06T14:46:27Z",
    "title_canon_sha256": "8a977f7f7b9633ff52d78dba1ad94a27fb2480319371199abcbcabb70ff7d26c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0604022",
    "kind": "arxiv",
    "version": 4
  }
}