Pith Number

pith:TNSDFBO2

pith:2018:TNSDFBO25HOZFPAEFZQGYW6ZYD

not attested not anchored not stored refs pending

On the Infinitesimal Torelli theorem for regular surfaces with very ample canonical divisor

Igor Reider

arxiv:1803.01357 v1 · 2018-03-04 · 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{TNSDFBO25HOZFPAEFZQGYW6ZYD}

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	2026-05-18T00:22:00.929595Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9b643285dae9dd92bc042e606c5bd9c0d929cd2bc22e743497f786d1630efbc4

Aliases

arxiv: 1803.01357 · arxiv_version: 1803.01357v1 · doi: 10.48550/arxiv.1803.01357 · pith_short_12: TNSDFBO25HOZ · pith_short_16: TNSDFBO25HOZFPAE · pith_short_8: TNSDFBO2

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/TNSDFBO25HOZFPAEFZQGYW6ZYD \
  | 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: 9b643285dae9dd92bc042e606c5bd9c0d929cd2bc22e743497f786d1630efbc4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3c3cdd7c953be1d50604ca64c29ade099c73c79870ecb8c0533c906ba87b5b38",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2018-03-04T14:03:10Z",
    "title_canon_sha256": "9899a173784208fc90d71a08260bcd9f415858eca2e78d258a4dd4ad7e8bc452"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.01357",
    "kind": "arxiv",
    "version": 1
  }
}