Pith Number

pith:IJ7ZDT2X

pith:2009:IJ7ZDT2XZ6HPGOFWNHMBEZ3VS3

not attested not anchored not stored refs pending

The action of the affine diffeomorphisms on the relative homology group of certain exceptionally symmetric origamis

Carlos Matheus, Jean-Christophe Yoccoz

arxiv:0912.1425 v2 · 2009-12-08 · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IJ7ZDT2XZ6HPGOFWNHMBEZ3VS3}

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	2026-05-18T04:39:50.340514Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

427f91cf57cf8ef338b669d812677596fb57d1f0fe5de1f9ae67e642650de3c2

Aliases

arxiv: 0912.1425 · arxiv_version: 0912.1425v2 · doi: 10.48550/arxiv.0912.1425 · pith_short_12: IJ7ZDT2XZ6HP · pith_short_16: IJ7ZDT2XZ6HPGOFW · pith_short_8: IJ7ZDT2X

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/IJ7ZDT2XZ6HPGOFWNHMBEZ3VS3 \
  | 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: 427f91cf57cf8ef338b669d812677596fb57d1f0fe5de1f9ae67e642650de3c2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8e78248b09f66f2044a225de57d975ccb59dd6f13452b269e61c077407d4762c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2009-12-08T07:43:49Z",
    "title_canon_sha256": "2b74350ecc625a96cfc1b48b5ccdc43bc691a094c8ce9760b5e5e1ac904387d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.1425",
    "kind": "arxiv",
    "version": 2
  }
}