Pith Number

pith:SZWZAMXU

pith:2020:SZWZAMXUTLAITINMTYFIUIAV32

not attested not anchored not stored refs pending

On the roots of the Poupard and Kreweras polynomials

Fr\'ed\'eric Chapoton (IRMA), Guo-Niu Han (IRMA)

arxiv:2001.01449 v1 · 2020-01-06 · 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{SZWZAMXUTLAITINMTYFIUIAV32}

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	2026-07-05T00:29:46.929229Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

966d9032f49ac089a1ac9e0a8a2015deb3c6814c70155d693716dade805902cc

Aliases

arxiv: 2001.01449 · arxiv_version: 2001.01449v1 · doi: 10.48550/arxiv.2001.01449 · pith_short_12: SZWZAMXUTLAI · pith_short_16: SZWZAMXUTLAITINM · pith_short_8: SZWZAMXU

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/SZWZAMXUTLAITINMTYFIUIAV32 \
  | 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: 966d9032f49ac089a1ac9e0a8a2015deb3c6814c70155d693716dade805902cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2af084d6ceae1c51421fa6686f66a67cb0b0e5ff3f9667b66081c4afeefce37b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2020-01-06T09:27:44Z",
    "title_canon_sha256": "ac274eb57f664ea9f920359f6013946960512f1e89a5f4738097dfcd7a5d0b92"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2001.01449",
    "kind": "arxiv",
    "version": 1
  }
}