Pith Number

pith:TZRWYX7E

pith:2008:TZRWYX7EBIJMGT34IWEDJCREUY

not attested not anchored not stored refs pending

Covers of surfaces with fixed branch locus

Bas Edixhoven, Jan Schepers, Robin de Jong

arxiv:0807.0184 v2 · 2008-07-01 · 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{TZRWYX7EBIJMGT34IWEDJCREUY}

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	2026-05-18T03:59:14.179478Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9e636c5fe40a12c34f7c4588348a24a60b818a260ee316a81f8fbf82ea871fd0

Aliases

arxiv: 0807.0184 · arxiv_version: 0807.0184v2 · doi: 10.48550/arxiv.0807.0184 · pith_short_12: TZRWYX7EBIJM · pith_short_16: TZRWYX7EBIJMGT34 · pith_short_8: TZRWYX7E

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/TZRWYX7EBIJMGT34IWEDJCREUY \
  | 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: 9e636c5fe40a12c34f7c4588348a24a60b818a260ee316a81f8fbf82ea871fd0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a3e11bc3d04fd3aa85d9672ad8da40a7f6d972bce9d0442fa1092abeccd9bb93",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2008-07-01T15:41:12Z",
    "title_canon_sha256": "1cd14e3e08432237f259f15fd91e7b701ac41f7e0aa81ee4fb21bcb169994e31"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.0184",
    "kind": "arxiv",
    "version": 2
  }
}