Pith Number

pith:JI7VPD6S

pith:2009:JI7VPD6SZCI76DXNDIPLDRQXXO

not attested not anchored not stored refs pending

Tarski's plank problem revisited

Karoly Bezdek

arxiv:0903.4637 v1 · 2009-03-26 · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JI7VPD6SZCI76DXNDIPLDRQXXO}

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	2026-05-18T02:43:02.821868Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4a3f578fd2c891ff0eed1a1eb1c617bb9130e699e6f2992593f6d7430d52e510

Aliases

arxiv: 0903.4637 · arxiv_version: 0903.4637v1 · doi: 10.48550/arxiv.0903.4637 · pith_short_12: JI7VPD6SZCI7 · pith_short_16: JI7VPD6SZCI76DXN · pith_short_8: JI7VPD6S

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/JI7VPD6SZCI76DXNDIPLDRQXXO \
  | 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: 4a3f578fd2c891ff0eed1a1eb1c617bb9130e699e6f2992593f6d7430d52e510

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fc49140f819b96c5be7fd1ff8bf89f3fe6b5abe02abe161c8d22b707d90c3820",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2009-03-26T17:04:01Z",
    "title_canon_sha256": "22dfe4149737598dfa20621392f1c51c4e5d076f676fd59f8d5cb17a174945b5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.4637",
    "kind": "arxiv",
    "version": 1
  }
}