Pith Number

pith:HU7JDJTA

pith:2009:HU7JDJTACT5J7BRCKLZO5GCI2O

not attested not anchored not stored refs pending

On Reichenbach's causal betweenness

Baoyindureng Wu, Vasek Chvatal

arxiv:0902.1763 v1 · 2009-02-10 · 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{HU7JDJTACT5J7BRCKLZO5GCI2O}

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	2026-05-18T03:56:23.068906Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3d3e91a66014fa9f862252f2ee9848d3baa6ba0136501ab5612d0326ac93313f

Aliases

arxiv: 0902.1763 · arxiv_version: 0902.1763v1 · doi: 10.48550/arxiv.0902.1763 · pith_short_12: HU7JDJTACT5J · pith_short_16: HU7JDJTACT5J7BRC · pith_short_8: HU7JDJTA

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/HU7JDJTACT5J7BRCKLZO5GCI2O \
  | 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: 3d3e91a66014fa9f862252f2ee9848d3baa6ba0136501ab5612d0326ac93313f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f8dc9fbbb8b939e2bc4f74eff3dc11b8ecf0a17f715a03635b462fe031e69201",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2009-02-10T21:41:23Z",
    "title_canon_sha256": "68ad657d3611caa8cf11c5963cf4e6394d96200bb958c3053df7d957fbd5ad73"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.1763",
    "kind": "arxiv",
    "version": 1
  }
}