Pith Number

pith:6PVC4RCF

pith:2004:6PVC4RCFXI7C6AXKALGRN4OPC4

not attested not anchored not stored refs pending

On exceptional Enriques surfaces

N. I. Shepherd-Barron, T. Ekedahl

arxiv:math/0405510 v2 · 2004-05-26 · 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{6PVC4RCFXI7C6AXKALGRN4OPC4}

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	2026-07-05T03:09:11.344429Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f3ea2e4445ba3e2f02ea02cd16f1cf17170c6b53d9789340974d4254fbbc13be

Aliases

arxiv: math/0405510 · arxiv_version: math/0405510v2 · doi: 10.48550/arxiv.math/0405510 · pith_short_12: 6PVC4RCFXI7C · pith_short_16: 6PVC4RCFXI7C6AXK · pith_short_8: 6PVC4RCF

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/6PVC4RCFXI7C6AXKALGRN4OPC4 \
  | 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: f3ea2e4445ba3e2f02ea02cd16f1cf17170c6b53d9789340974d4254fbbc13be

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3185c39059daab83850c6903b19eaf4fd72e019d62300950b3800e0a67dfe15c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2004-05-26T21:57:34Z",
    "title_canon_sha256": "f4274376811b326ab3a50c877a493789010b7658ed7918d9285227ccde7a7bab"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0405510",
    "kind": "arxiv",
    "version": 2
  }
}