Pith Number

pith:2MFBMEE2

pith:2010:2MFBMEE2QPJ3IXAT6ORG247A44

not attested not anchored not stored refs pending

Algorithms for Del Pezzo Surfaces of Degree 5 (Construction, Parametrization)

Irene Polo-Blanco, Jon Gonzalez-Sanchez, Josef Schicho, Michael Harrison

arxiv:1009.4044 v2 · 2010-09-21 · math.AG

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

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	2026-05-18T04:22:00.821186Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d30a16109a83d3b45c13f3a26d73e0e735cef4d72d9dc3404f98c5bce8877725

Aliases

arxiv: 1009.4044 · arxiv_version: 1009.4044v2 · doi: 10.48550/arxiv.1009.4044 · pith_short_12: 2MFBMEE2QPJ3 · pith_short_16: 2MFBMEE2QPJ3IXAT · pith_short_8: 2MFBMEE2

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/2MFBMEE2QPJ3IXAT6ORG247A44 \
  | 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: d30a16109a83d3b45c13f3a26d73e0e735cef4d72d9dc3404f98c5bce8877725

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d6693b019f02352207c2e2a477367c64bb0802fce8eaac89485e664afdf12035",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2010-09-21T10:23:29Z",
    "title_canon_sha256": "800bc74bb268c8c7766e2743ef4c96aee08287a6d265701ad122fbdc10573e6c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.4044",
    "kind": "arxiv",
    "version": 2
  }
}