Pith Number

pith:OEY4IGNN

pith:2008:OEY4IGNNXGGLYFTFZUW4DK3B2N

not attested not anchored not stored refs pending

Partitions of trees and ACA'

Bernard A. Anderson, Jeffry L. Hirst

arxiv:0809.2267 v2 · 2008-09-12 · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OEY4IGNNXGGLYFTFZUW4DK3B2N}

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	2026-05-18T04:20:13.438709Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7131c419adb98cbc1665cd2dc1ab61d36e8a9e75fc7a3b4cd6343b06f7a3d9ea

Aliases

arxiv: 0809.2267 · arxiv_version: 0809.2267v2 · doi: 10.48550/arxiv.0809.2267 · pith_short_12: OEY4IGNNXGGL · pith_short_16: OEY4IGNNXGGLYFTF · pith_short_8: OEY4IGNN

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/OEY4IGNNXGGLYFTFZUW4DK3B2N \
  | 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: 7131c419adb98cbc1665cd2dc1ab61d36e8a9e75fc7a3b4cd6343b06f7a3d9ea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6612ffe650f944eeb3271f68345fc33519d9b9f0cc3b3d505dce7b063baa3dbd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2008-09-12T18:27:02Z",
    "title_canon_sha256": "aa63c3b7693cb2adfaf36132909aecbb4a6a23b00b6658facb1df46ff2b876fd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.2267",
    "kind": "arxiv",
    "version": 2
  }
}