Pith Number

pith:BZU53QSN

pith:2012:BZU53QSNP2QO75FSZYQFASDVH2

not attested not anchored not stored refs pending

On Zudilin's q-question about Schmidt's problem

Jiang Zeng, Victor J. W. Guo

arxiv:1204.0187 v3 · 2012-04-01 · 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{BZU53QSNP2QO75FSZYQFASDVH2}

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	2026-05-18T03:50:37.228597Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0e69ddc24d7ea0eff4b2ce205048753e8cfc370826b65d8cee6fb24c93552b50

Aliases

arxiv: 1204.0187 · arxiv_version: 1204.0187v3 · doi: 10.48550/arxiv.1204.0187 · pith_short_12: BZU53QSNP2QO · pith_short_16: BZU53QSNP2QO75FS · pith_short_8: BZU53QSN

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/BZU53QSNP2QO75FSZYQFASDVH2 \
  | 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: 0e69ddc24d7ea0eff4b2ce205048753e8cfc370826b65d8cee6fb24c93552b50

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a4c6e56f6944a4264c59b2c5c4a2117cf17a12657670e5a391a69a107ed09da4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-04-01T10:02:17Z",
    "title_canon_sha256": "8408c94b208394a21ef9e2550aa49444f04e7aa34f13102b45c892c300ac3a1e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.0187",
    "kind": "arxiv",
    "version": 3
  }
}