Pith Number

pith:J3A3MJXD

pith:2009:J3A3MJXDTJ6RCRD2NX3GCD2RWV

not attested not anchored not stored refs pending

Fermat hypersurfaces and Subcanonical curves

Francesco Zucconi, Pietro De Poi

arxiv:0908.0522 v4 · 2009-08-04 · math.AG · math.AC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{J3A3MJXDTJ6RCRD2NX3GCD2RWV}

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	2026-05-18T02:49:54.368606Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4ec1b626e39a7d11447a6df6610f51b5786b361a9e5414df79f15b5052e908e0

Aliases

arxiv: 0908.0522 · arxiv_version: 0908.0522v4 · doi: 10.48550/arxiv.0908.0522 · pith_short_12: J3A3MJXDTJ6R · pith_short_16: J3A3MJXDTJ6RCRD2 · pith_short_8: J3A3MJXD

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/J3A3MJXDTJ6RCRD2NX3GCD2RWV \
  | 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: 4ec1b626e39a7d11447a6df6610f51b5786b361a9e5414df79f15b5052e908e0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a3b20f8d0aaa925b35b474560d30d7e5e2409dd3379da95c46286e2562878c78",
    "cross_cats_sorted": [
      "math.AC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2009-08-04T19:38:02Z",
    "title_canon_sha256": "8e14b59d16654a86e5888c7dcfb55ce90d2efaa76d85094eefeee3533b45f060"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.0522",
    "kind": "arxiv",
    "version": 4
  }
}