Pith Number

pith:LXMQMSYA

pith:2017:LXMQMSYA22L2NTHJI6YDXLXNIW

not attested not anchored not stored refs pending

Nonlinearity of some subgroups of the planar Cremona group

Yves Cornulier

arxiv:1701.00275 v1 · 2017-01-01 · math.AG · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LXMQMSYA22L2NTHJI6YDXLXNIW}

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	2026-05-18T00:53:35.955466Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5dd9064b00d697a6cce947b03baeed45ba7a06d2f4a7d6d9e50482210b8d1f35

Aliases

arxiv: 1701.00275 · arxiv_version: 1701.00275v1 · doi: 10.48550/arxiv.1701.00275 · pith_short_12: LXMQMSYA22L2 · pith_short_16: LXMQMSYA22L2NTHJ · pith_short_8: LXMQMSYA

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/LXMQMSYA22L2NTHJI6YDXLXNIW \
  | 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: 5dd9064b00d697a6cce947b03baeed45ba7a06d2f4a7d6d9e50482210b8d1f35

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "119cbcf46ffd4e274e28931e59b0c6ff6e42a1527d1c6869f57e7ad725c8ddc9",
    "cross_cats_sorted": [
      "math.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-01-01T18:28:58Z",
    "title_canon_sha256": "84d3d103facdda29500959146749a0ff0336afc1145a5c5801cc3add579f3ec1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.00275",
    "kind": "arxiv",
    "version": 1
  }
}