Pith Number

pith:NIV3JDT7

pith:2018:NIV3JDT7DSFETPAVPGW5MYVQNU

not attested not anchored not stored refs pending

Fano deformation rigidity of rational homogeneous spaces of submaximal Picard numbers

Qifeng Li

arxiv:1812.04173 v1 · 2018-12-11 · 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{NIV3JDT7DSFETPAVPGW5MYVQNU}

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	2026-05-17T23:58:35.361336Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a2bb48e7f1c8a49bc1579add662b06d03e6cd9e7773fcdac05c4172d1da4745

Aliases

arxiv: 1812.04173 · arxiv_version: 1812.04173v1 · doi: 10.48550/arxiv.1812.04173 · pith_short_12: NIV3JDT7DSFE · pith_short_16: NIV3JDT7DSFETPAV · pith_short_8: NIV3JDT7

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/NIV3JDT7DSFETPAVPGW5MYVQNU \
  | 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: 6a2bb48e7f1c8a49bc1579add662b06d03e6cd9e7773fcdac05c4172d1da4745

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1cce89baab66ddbb7806b86da4cbceb3f83f439cdeee68a74beff8b9ab703a18",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2018-12-11T01:12:20Z",
    "title_canon_sha256": "7e7ede9485818bd301faf282f95eca007a49159578a85af82d0f7125882d5a98"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.04173",
    "kind": "arxiv",
    "version": 1
  }
}