Pith Number

pith:O7UQP33L

pith:2014:O7UQP33LPBRWV443X5BUQUYHH2

not attested not anchored not stored refs pending

Prime order birational diffeomorphisms of the sphere

Maria Fernanda Robayo

arxiv:1408.1880 v1 · 2014-08-08 · 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{O7UQP33LPBRWV443X5BUQUYHH2}

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	2026-05-18T00:56:36.311543Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

77e907ef6b78636af39bbf434853073e84c62a56c9eaf4e6369cd47871ca5dcf

Aliases

arxiv: 1408.1880 · arxiv_version: 1408.1880v1 · doi: 10.48550/arxiv.1408.1880 · pith_short_12: O7UQP33LPBRW · pith_short_16: O7UQP33LPBRWV443 · pith_short_8: O7UQP33L

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/O7UQP33LPBRWV443X5BUQUYHH2 \
  | 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: 77e907ef6b78636af39bbf434853073e84c62a56c9eaf4e6369cd47871ca5dcf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17b18725d401b10c7d638c751c656ce599a9305fba13206ef4fa4e861c5767d6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2014-08-08T15:17:47Z",
    "title_canon_sha256": "acbd5919ec0d52828c43e34496e49655fb559e3e89015d3bd68b0ba4317cb13f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.1880",
    "kind": "arxiv",
    "version": 1
  }
}