Pith Number

pith:7LY5DOHN

pith:2009:7LY5DOHNISVDAJH4DJ34DWIGOV

not attested not anchored not stored refs pending

Transcendental lattice of an extremal elliptic surface

Alex Degtyarev

arxiv:0907.1809 v3 · 2009-07-10 · 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{7LY5DOHNISVDAJH4DJ34DWIGOV}

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	2026-05-18T03:56:45.391676Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

faf1d1b8ed44aa3024fc1a77c1d906757796f95deff5f31dadd2c97377d05f03

Aliases

arxiv: 0907.1809 · arxiv_version: 0907.1809v3 · doi: 10.48550/arxiv.0907.1809 · pith_short_12: 7LY5DOHNISVD · pith_short_16: 7LY5DOHNISVDAJH4 · pith_short_8: 7LY5DOHN

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/7LY5DOHNISVDAJH4DJ34DWIGOV \
  | 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: faf1d1b8ed44aa3024fc1a77c1d906757796f95deff5f31dadd2c97377d05f03

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3aa14de9b6cb6d49becd1dc756284502586b597278c6cffadc7cebb6189a9e3f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2009-07-10T13:17:26Z",
    "title_canon_sha256": "5a2c1c7ceb502bee181ea7dd6fedb3822ecce04366854f0555724f470b8ff75b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.1809",
    "kind": "arxiv",
    "version": 3
  }
}