Pith Number

pith:EOAMZ25S

pith:2014:EOAMZ25SOMHQHWT7D7MRUMBRK2

not attested not anchored not stored refs pending

Redundant blow-ups of rational surfaces with big anticanonical divisor

Dongseon Hwang, Jinhyung Park

arxiv:1411.3891 v1 · 2014-11-14 · 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{EOAMZ25SOMHQHWT7D7MRUMBRK2}

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	2026-05-18T02:37:37.422535Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2380ccebb2730f03da7f1fd91a303156a3802f6a5c7318dfb0690be3ee998bea

Aliases

arxiv: 1411.3891 · arxiv_version: 1411.3891v1 · doi: 10.48550/arxiv.1411.3891 · pith_short_12: EOAMZ25SOMHQ · pith_short_16: EOAMZ25SOMHQHWT7 · pith_short_8: EOAMZ25S

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/EOAMZ25SOMHQHWT7D7MRUMBRK2 \
  | 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: 2380ccebb2730f03da7f1fd91a303156a3802f6a5c7318dfb0690be3ee998bea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "32f9590ca38bd70a8f9b7aac890cda7b049116c8901dee887f0e936894b1dc87",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2014-11-14T13:00:47Z",
    "title_canon_sha256": "51f244dbd0bada30cae698354dc432c9c84da56ddf8343943efc0dc85fa62165"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1411.3891",
    "kind": "arxiv",
    "version": 1
  }
}