Pith Number

pith:3JRSQO4R

pith:2011:3JRSQO4R42YPB5C2G44PE7K7MV

not attested not anchored not stored refs pending

The tame and the wild automorphisms of an affine quadric threefold

St\'ephane Lamy, St\'ephane V\'en\'ereau

arxiv:1103.4291 v2 · 2011-03-22 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3JRSQO4R42YPB5C2G44PE7K7MV}

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	2026-05-18T00:16:03.443670Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

da63283b91e6b0f0f45a3738f27d5f655dc6162674122743add07c6bea8ee85a

Aliases

arxiv: 1103.4291 · arxiv_version: 1103.4291v2 · doi: 10.48550/arxiv.1103.4291 · pith_short_12: 3JRSQO4R42YP · pith_short_16: 3JRSQO4R42YPB5C2 · pith_short_8: 3JRSQO4R

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/3JRSQO4R42YPB5C2G44PE7K7MV \
  | 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: da63283b91e6b0f0f45a3738f27d5f655dc6162674122743add07c6bea8ee85a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eedf2e885b48cdb4f3ef0885d655c7c2a8ea72ea67391787d69e8f4f12866fdd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2011-03-22T15:32:48Z",
    "title_canon_sha256": "ba0d708d26b8f9640c2394897866be81969e31cef397d4acafc61ae047796815"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1103.4291",
    "kind": "arxiv",
    "version": 2
  }
}