Pith Number

pith:5YNC443K

pith:2009:5YNC443KKCKEYIEXIQ5SYKW4PB

not attested not anchored not stored refs pending

On ramified covers of the projective plane I: Segre's theory and classification in small degrees, with Appendix by Eugenii Shustin

Maxim Leyenson, Michael Friedman

arxiv:0903.3359 v7 · 2009-03-19 · 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{5YNC443KKCKEYIEXIQ5SYKW4PB}

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	2026-05-18T04:42:44.742698Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ee1a2e736a50944c2097443b2c2adc785dfa5fe4e4fa36c368bafa57da131741

Aliases

arxiv: 0903.3359 · arxiv_version: 0903.3359v7 · doi: 10.48550/arxiv.0903.3359 · pith_short_12: 5YNC443KKCKE · pith_short_16: 5YNC443KKCKEYIEX · pith_short_8: 5YNC443K

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/5YNC443KKCKEYIEXIQ5SYKW4PB \
  | 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: ee1a2e736a50944c2097443b2c2adc785dfa5fe4e4fa36c368bafa57da131741

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2fa6afd81e935718810baa680d7eac16c639cb2a1fa4633691cef66b7c7ddf7d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2009-03-19T16:26:52Z",
    "title_canon_sha256": "a1d66511a5df9d5a4fb5894e13e0f75ae24f94e223eaa2c8a274238f3acc86b0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.3359",
    "kind": "arxiv",
    "version": 7
  }
}