Pith Number

pith:XS2QEUGL

pith:2019:XS2QEUGLQXAIJJVG2XTNUF6557

not attested not anchored not stored refs pending

On the hypersurfaces contained in their Hessian

Giovanna Ilardi, Pietro De Poi

arxiv:1903.06967 v1 · 2019-03-16 · 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{XS2QEUGLQXAIJJVG2XTNUF6557}

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	2026-05-17T23:51:06.618046Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bcb50250cb85c084a6a6d5e6da17ddefc14dfdb1ebb1c5b3fb3516f1d0acf793

Aliases

arxiv: 1903.06967 · arxiv_version: 1903.06967v1 · doi: 10.48550/arxiv.1903.06967 · pith_short_12: XS2QEUGLQXAI · pith_short_16: XS2QEUGLQXAIJJVG · pith_short_8: XS2QEUGL

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/XS2QEUGLQXAIJJVG2XTNUF6557 \
  | 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: bcb50250cb85c084a6a6d5e6da17ddefc14dfdb1ebb1c5b3fb3516f1d0acf793

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b8426b2774804d8518646531426716103d5312e33f933613d6443d5c30bb9088",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-03-16T18:20:34Z",
    "title_canon_sha256": "1e0ff7ae0a7287c31393726505d454628af101ca6dca8b0f3212cf5396ee6509"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.06967",
    "kind": "arxiv",
    "version": 1
  }
}