Pith Number

pith:UEU34FDV

pith:2018:UEU34FDVW5LVJKBGZTBQLXWG4L

not attested not anchored not stored refs pending

Toward an algebraic theory of Welschinger invariants

Marc Levine

arxiv:1808.02238 v1 · 2018-08-07 · 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{UEU34FDVW5LVJKBGZTBQLXWG4L}

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	2026-05-18T00:08:47.147339Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a129be1475b75754a826ccc305dec6e2d446d23af8f4d705c21e06d542f48225

Aliases

arxiv: 1808.02238 · arxiv_version: 1808.02238v1 · doi: 10.48550/arxiv.1808.02238 · pith_short_12: UEU34FDVW5LV · pith_short_16: UEU34FDVW5LVJKBG · pith_short_8: UEU34FDV

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/UEU34FDVW5LVJKBGZTBQLXWG4L \
  | 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: a129be1475b75754a826ccc305dec6e2d446d23af8f4d705c21e06d542f48225

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c184559cb7c73aaf7fe58488f1721695165bc60ce36365b0a581942272a759f6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2018-08-07T07:27:54Z",
    "title_canon_sha256": "00c7099b2987ac04bd25ed293d0f31ffe1e2ed5a4c9c5b18340752303cab2308"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.02238",
    "kind": "arxiv",
    "version": 1
  }
}