Pith Number

pith:EFB4XZPD

pith:2014:EFB4XZPDTKA52L3UZ6LEATXGIE

not attested not anchored not stored refs pending

Log-canonical pairs and Gorenstein stable surfaces with $K_X^2=1$

Marco Franciosi, Rita Pardini, S\"onke Rollenske

arxiv:1403.2159 v1 · 2014-03-10 · 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{EFB4XZPDTKA52L3UZ6LEATXGIE}

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	2026-05-18T01:35:12.356678Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2143cbe5e39a81dd2f74cf96404ee641015ce2df8952b2a301ddc00d2c1680e1

Aliases

arxiv: 1403.2159 · arxiv_version: 1403.2159v1 · doi: 10.48550/arxiv.1403.2159 · pith_short_12: EFB4XZPDTKA5 · pith_short_16: EFB4XZPDTKA52L3U · pith_short_8: EFB4XZPD

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/EFB4XZPDTKA52L3UZ6LEATXGIE \
  | 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: 2143cbe5e39a81dd2f74cf96404ee641015ce2df8952b2a301ddc00d2c1680e1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba958c94c6a666295df77e5c3e86364ac436fd26d72aae168169ece8d37c0dd5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2014-03-10T08:15:57Z",
    "title_canon_sha256": "ac4ef24ec4968cf97798bf2ae002a7f342d2b0cbd4c37360874a246d1d74809b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.2159",
    "kind": "arxiv",
    "version": 1
  }
}