Pith Number

pith:U7JNTKTJ

pith:2019:U7JNTKTJR7ZBMLQMOBDVNV5Z7O

not attested not anchored not stored refs pending

Morphisms from a very general hypersurface

De-Qi Zhang, Yongnam Lee, Yujie Luo

arxiv:1908.06894 v6 · 2019-08-19 · 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{U7JNTKTJR7ZBMLQMOBDVNV5Z7O}

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	2026-06-11T01:09:05.785892Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a7d2d9aa698ff2162e0c704756d7b9fba5c5eb47ff31756329dcd52386568a3d

Aliases

arxiv: 1908.06894 · arxiv_version: 1908.06894v6 · doi: 10.48550/arxiv.1908.06894 · pith_short_12: U7JNTKTJR7ZB · pith_short_16: U7JNTKTJR7ZBMLQM · pith_short_8: U7JNTKTJ

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/U7JNTKTJR7ZBMLQMOBDVNV5Z7O \
  | 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: a7d2d9aa698ff2162e0c704756d7b9fba5c5eb47ff31756329dcd52386568a3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "26227bc3005f46a0a30aee09ec8890f7ac90ec6a22733326120506188a669255",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-08-19T15:52:53Z",
    "title_canon_sha256": "374eec8b10653ea8f9b90808aac78f32a915f41824bf03b2c84ad3e33ddca199"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.06894",
    "kind": "arxiv",
    "version": 6
  }
}