Pith Number

pith:SKEJSKW5

pith:2013:SKEJSKW5CHPU5SPONZNAFOBE3G

not attested not anchored not stored refs pending

A generalized Bogomolov-Gieseker inequality for the smooth quadric threefold

Benjamin Schmidt

arxiv:1309.4265 v3 · 2013-09-17 · 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{SKEJSKW5CHPU5SPONZNAFOBE3G}

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	2026-05-18T02:25:32.831251Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9288992add11df4ec9ee6e5a02b824d993775dfca1f9bea3185d11442c0fc793

Aliases

arxiv: 1309.4265 · arxiv_version: 1309.4265v3 · doi: 10.48550/arxiv.1309.4265 · pith_short_12: SKEJSKW5CHPU · pith_short_16: SKEJSKW5CHPU5SPO · pith_short_8: SKEJSKW5

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/SKEJSKW5CHPU5SPONZNAFOBE3G \
  | 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: 9288992add11df4ec9ee6e5a02b824d993775dfca1f9bea3185d11442c0fc793

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0c6e287debb554e3cdca3c4b82a8a44d40a3ab34f529a1936875c24617093978",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-09-17T11:40:12Z",
    "title_canon_sha256": "e4854f555e47d7f54e5a795cb05c4e6a5158dd62e4fac10bd7fc66e80e238e21"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.4265",
    "kind": "arxiv",
    "version": 3
  }
}