Pith Number

pith:4DK2NF6U

pith:2019:4DK2NF6UCOLNZJW7ORJD7W4MC3

not attested not anchored not stored refs pending

Delete Nim

Koki Suetsugu, Tomoaki Abuku

arxiv:1908.07763 v1 · 2019-08-21 · 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{4DK2NF6UCOLNZJW7ORJD7W4MC3}

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	2026-07-04T23:59:00.973097Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0d5a697d41396dca6df74523fdb8c16e76bf3461f25f2b1a2b99ecba64fc511

Aliases

arxiv: 1908.07763 · arxiv_version: 1908.07763v1 · doi: 10.48550/arxiv.1908.07763 · pith_short_12: 4DK2NF6UCOLN · pith_short_16: 4DK2NF6UCOLNZJW7 · pith_short_8: 4DK2NF6U

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/4DK2NF6UCOLNZJW7ORJD7W4MC3 \
  | 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: e0d5a697d41396dca6df74523fdb8c16e76bf3461f25f2b1a2b99ecba64fc511

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eb71090faca5b9984bc710de348c6aeea1c1d49e9774e2027269ffd21ca21a48",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-08-21T09:29:53Z",
    "title_canon_sha256": "8e3781fa00257ce91c069534acb5fdd48a14978da417097518def7f497d2e9e1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.07763",
    "kind": "arxiv",
    "version": 1
  }
}