Pith Number

pith:MRIXMWZU

pith:2009:MRIXMWZUTBG3R6X7RYFUVCKCI6

not attested not anchored not stored refs pending

A formal calculus on the Riordan near algebra

G\'erard Duchamp (LIPN), Laurent Poinsot (LIPN)

arxiv:0902.2853 v4 · 2009-02-17 · cs.SC · 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{MRIXMWZUTBG3R6X7RYFUVCKCI6}

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	2026-05-18T04:40:09.566812Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6451765b34984db8faff8e0b4a8942478ab23e687931955865bde0bee8f6747d

Aliases

arxiv: 0902.2853 · arxiv_version: 0902.2853v4 · doi: 10.48550/arxiv.0902.2853 · pith_short_12: MRIXMWZUTBG3 · pith_short_16: MRIXMWZUTBG3R6X7 · pith_short_8: MRIXMWZU

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/MRIXMWZUTBG3R6X7RYFUVCKCI6 \
  | 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: 6451765b34984db8faff8e0b4a8942478ab23e687931955865bde0bee8f6747d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e020705af7f52b49502a396ac4f2b2cbd51dc607687da5949a12d8e5f6588444",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SC",
    "submitted_at": "2009-02-17T08:13:27Z",
    "title_canon_sha256": "17a50220f0893c04eebccb81ad9869c452f318cbe8991a34d811ff83a713ff81"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.2853",
    "kind": "arxiv",
    "version": 4
  }
}