Pith Number

pith:PSNF4WQH

pith:2011:PSNF4WQHGOZULUTQXQDJSHZ4FJ

not attested not anchored not stored refs pending

A new order theory of set systems and better quasi-orderings

Yohji Akama

arxiv:1112.2801 v3 · 2011-12-13 · math.CO · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PSNF4WQHGOZULUTQXQDJSHZ4FJ}

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	2026-05-18T04:01:12.897672Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c9a5e5a0733b345d270bc06991f3c2a4a4c1280a07659db089299c65c6fb28f

Aliases

arxiv: 1112.2801 · arxiv_version: 1112.2801v3 · doi: 10.48550/arxiv.1112.2801 · pith_short_12: PSNF4WQHGOZU · pith_short_16: PSNF4WQHGOZULUTQ · pith_short_8: PSNF4WQH

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/PSNF4WQHGOZULUTQXQDJSHZ4FJ \
  | 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: 7c9a5e5a0733b345d270bc06991f3c2a4a4c1280a07659db089299c65c6fb28f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d4704f970e57c4ab7bb078c07ec2e227475e60c0a5ae073a58fcbef3ea79ee8e",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-12-13T06:04:05Z",
    "title_canon_sha256": "bd2bdf5ba88c096758666226d80d3874a95137bd6379f05651d71c284ea0d93c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.2801",
    "kind": "arxiv",
    "version": 3
  }
}