Pith Number

pith:QVEDESDS

pith:2015:QVEDESDSFFU2Q4RADK2MAL2YMU

not attested not anchored not stored refs pending

On the number of open knight's tours

Ernesto Mordecki, H\'ector Cancela

arxiv:1507.03642 v1 · 2015-07-13 · 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{QVEDESDSFFU2Q4RADK2MAL2YMU}

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	2026-05-18T01:36:57.732031Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85483248722969a872201ab4c02f58651decce303e5629114cf087ef679a2401

Aliases

arxiv: 1507.03642 · arxiv_version: 1507.03642v1 · doi: 10.48550/arxiv.1507.03642 · pith_short_12: QVEDESDSFFU2 · pith_short_16: QVEDESDSFFU2Q4RA · pith_short_8: QVEDESDS

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/QVEDESDSFFU2Q4RADK2MAL2YMU \
  | 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: 85483248722969a872201ab4c02f58651decce303e5629114cf087ef679a2401

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7961a1a47b1bb2b2985aa7a28ab7a50d24158ae865af590fe78af65187f68974",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-07-13T22:25:21Z",
    "title_canon_sha256": "814fd028ef1ea119ae2edf277697627a9b4e5271c7a29551d4dd98d2c66ff569"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.03642",
    "kind": "arxiv",
    "version": 1
  }
}