Pith Number

pith:OAGFBCQD

pith:2019:OAGFBCQDVSK2KEFWFYS4PHFVWW

not attested not anchored not stored refs pending

Surfaces on the Severi line in positive characteristics

Mingshuo Zhou, Xiaotao Sun, Yi Gu

arxiv:1908.01933 v2 · 2019-08-06 · 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{OAGFBCQDVSK2KEFWFYS4PHFVWW}

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	2026-07-05T00:05:24.826289Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

700c508a03ac95a510b62e25c79cb5b59bbc1b7bf877108e8b36063ef66b7c05

Aliases

arxiv: 1908.01933 · arxiv_version: 1908.01933v2 · doi: 10.48550/arxiv.1908.01933 · pith_short_12: OAGFBCQDVSK2 · pith_short_16: OAGFBCQDVSK2KEFW · pith_short_8: OAGFBCQD

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/OAGFBCQDVSK2KEFWFYS4PHFVWW \
  | 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: 700c508a03ac95a510b62e25c79cb5b59bbc1b7bf877108e8b36063ef66b7c05

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e79ab7487c5017490312aec9c0d54d8fd559ed6daa2c08d7c6e406a0c476537",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-08-06T02:31:03Z",
    "title_canon_sha256": "e8c117b1742b7abbd3c244dd29693ed243adb7b0fde66e19f33b7152d3c0ddc7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.01933",
    "kind": "arxiv",
    "version": 2
  }
}