Pith Number

pith:FTZHM6GQ

pith:2013:FTZHM6GQ7RSSJ34NFB57UUFUUK

not attested not anchored not stored refs pending

Domino Tatami Covering is NP-complete

Alejandro Erickson, Frank Ruskey

arxiv:1305.6669 v1 · 2013-05-29 · cs.CC · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FTZHM6GQ7RSSJ34NFB57UUFUUK}

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	2026-05-18T03:22:18.147046Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2cf27678d0fc6524ef8d287bfa50b4a2a4495d850e4ce4fa3ef648531167218f

Aliases

arxiv: 1305.6669 · arxiv_version: 1305.6669v1 · doi: 10.48550/arxiv.1305.6669 · pith_short_12: FTZHM6GQ7RSS · pith_short_16: FTZHM6GQ7RSSJ34N · pith_short_8: FTZHM6GQ

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/FTZHM6GQ7RSSJ34NFB57UUFUUK \
  | 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: 2cf27678d0fc6524ef8d287bfa50b4a2a4495d850e4ce4fa3ef648531167218f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17c8d270bc32ff66dbfacc89974252931a5dda93e5ef4bfabece183ff36ef947",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2013-05-29T01:00:33Z",
    "title_canon_sha256": "8f06f4380f3fcf147d0927ff4a37ef5a6fe2d4cf350d3b06074046be42cb2292"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.6669",
    "kind": "arxiv",
    "version": 1
  }
}