Pith Number

pith:4ARMXM7F

pith:2009:4ARMXM7FGIMCEIQMBRETOJMPK5

not attested not anchored not stored refs pending

A Combinatorial Enumeration Approach for Measuring Anonymity

Ang\`ele M. Hamel, Jean-Charles Gr\'egoire

arxiv:0902.1663 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{4ARMXM7FGIMCEIQMBRETOJMPK5}

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	2026-07-04T15:37:36.560852Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e022cbb3e5321822220c0c4937258f575c4aff4160319e1408dfdce86be6202f

Aliases

arxiv: 0902.1663 · arxiv_version: 0902.1663v1 · doi: 10.48550/arxiv.0902.1663 · pith_short_12: 4ARMXM7FGIMC · pith_short_16: 4ARMXM7FGIMCEIQM · pith_short_8: 4ARMXM7F

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/4ARMXM7FGIMCEIQMBRETOJMPK5 \
  | 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: e022cbb3e5321822220c0c4937258f575c4aff4160319e1408dfdce86be6202f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "61cd1fb162a28c910bf5dfef2b757a889ca08a474e4a3f2fd2660406334afcaf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2009-02-10T14:51:01Z",
    "title_canon_sha256": "d8f157000b69e81d0ebfd4882d10bf9c3f4eeb0eb6919bcf765d7aefaf89233f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.1663",
    "kind": "arxiv",
    "version": 1
  }
}