Pith Number

pith:QT5KO25J

pith:2016:QT5KO25J6U3ZXD7AM6FDRDOT5B

not attested not anchored not stored refs pending

Logarithmic vector fields and the Severi strata in the discriminant

David Mond, Duco van Straten, Paul Cadman

arxiv:1609.09305 v2 · 2016-09-29 · 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{QT5KO25J6U3ZXD7AM6FDRDOT5B}

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	2026-05-18T01:01:30.794016Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84faa76ba9f5379b8fe0678a388dd3e8721ba1bc267d5391a2a3733cbdca804b

Aliases

arxiv: 1609.09305 · arxiv_version: 1609.09305v2 · doi: 10.48550/arxiv.1609.09305 · pith_short_12: QT5KO25J6U3Z · pith_short_16: QT5KO25J6U3ZXD7A · pith_short_8: QT5KO25J

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/QT5KO25J6U3ZXD7AM6FDRDOT5B \
  | 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: 84faa76ba9f5379b8fe0678a388dd3e8721ba1bc267d5391a2a3733cbdca804b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eddded4d3b38db66de5c237e607005665f882ee3e4cd9f363f1e49f9f783384c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2016-09-29T11:54:26Z",
    "title_canon_sha256": "40b7293c7e84418d2a1634eb905b761deb31d183781754f26a0dcc045d203d20"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.09305",
    "kind": "arxiv",
    "version": 2
  }
}