Pith Number

pith:KF325OGX

pith:2013:KF325OGXTWPD6ZLRXXN2F6NQ65

not attested not anchored not stored refs pending

Bounding the volumes of singular weak log del Pezzo surfaces

Chen Jiang

arxiv:1305.6435 v1 · 2013-05-28 · 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{KF325OGXTWPD6ZLRXXN2F6NQ65}

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	2026-05-18T02:50:59.676273Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5177aeb8d79d9e3f6571bddba2f9b0f751d11c91fdba1a875dc19492253a7f6c

Aliases

arxiv: 1305.6435 · arxiv_version: 1305.6435v1 · doi: 10.48550/arxiv.1305.6435 · pith_short_12: KF325OGXTWPD · pith_short_16: KF325OGXTWPD6ZLR · pith_short_8: KF325OGX

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/KF325OGXTWPD6ZLRXXN2F6NQ65 \
  | 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: 5177aeb8d79d9e3f6571bddba2f9b0f751d11c91fdba1a875dc19492253a7f6c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c69c4300c12917083f0d4632cd27e061d8c093ffb8cdac7f88bc6a128fff39be",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-05-28T10:14:36Z",
    "title_canon_sha256": "28ca8032af5f7c0b8959fe8e7daf1484ffe170640d4f20d19dd1dbf38b86ce7e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.6435",
    "kind": "arxiv",
    "version": 1
  }
}