Pith Number

pith:OVPOSAYF

pith:2000:OVPOSAYFUDFVK2Q3LCKBXCLYNT

not attested not anchored not stored refs pending

Logarithmic deformations of normal crossing Enriques surfaces in characteristic two

Stefan Schroeer

arxiv:math/0005075 v2 · 2000-05-08 · 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{OVPOSAYFUDFVK2Q3LCKBXCLYNT}

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	2026-05-18T01:38:30.262451Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

755ee90305a0cb556a1b58941b89786cefff5b9937f0b409909c69510a836d56

Aliases

arxiv: math/0005075 · arxiv_version: math/0005075v2 · doi: 10.48550/arxiv.math/0005075 · pith_short_12: OVPOSAYFUDFV · pith_short_16: OVPOSAYFUDFVK2Q3 · pith_short_8: OVPOSAYF

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/OVPOSAYFUDFVK2Q3LCKBXCLYNT \
  | 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: 755ee90305a0cb556a1b58941b89786cefff5b9937f0b409909c69510a836d56

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d212949d4af536e85e36c20921c587aa377515dea2a25c75b77c1c5c4782fd8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.AG",
    "submitted_at": "2000-05-08T12:50:42Z",
    "title_canon_sha256": "611e0db5e9e71578a68c0a2df020cd9ffbc668256cc09db2315caa210e85c932"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0005075",
    "kind": "arxiv",
    "version": 2
  }
}