Pith Number

pith:4DFZ5344

pith:2025:4DFZ5344NK2DUCMIRO7L3RIJLU

not attested not anchored not stored refs pending

A determinant on birational maps of Severi-Brauer surfaces

Elias Kurz

arxiv:2502.02981 v1 · 2025-02-05 · 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{4DFZ5344NK2DUCMIRO7L3RIJLU}

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.

Cited by

1 paper in Pith

Birational Geometry of sextic del Pezzo surfaces

Receipt and verification

First computed	2026-07-05T10:09:57.736437Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0cb9eef9c6ab43a09888bbebdc5095d33791cc4172c73fef5b5e2136a625fb4

Aliases

arxiv: 2502.02981 · arxiv_version: 2502.02981v1 · doi: 10.48550/arxiv.2502.02981 · pith_short_12: 4DFZ5344NK2D · pith_short_16: 4DFZ5344NK2DUCMI · pith_short_8: 4DFZ5344

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/4DFZ5344NK2DUCMIRO7L3RIJLU \
  | 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: e0cb9eef9c6ab43a09888bbebdc5095d33791cc4172c73fef5b5e2136a625fb4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f5c4ff0fe2d2bc20b3b863f946b9b54e45d95ffafc252ad02bf97969b7eacee0",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2025-02-05T08:24:07Z",
    "title_canon_sha256": "1cc624c858516d2cf1f8101bc7b5988fe909fc78b11810d9277709d7f4063c6e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2502.02981",
    "kind": "arxiv",
    "version": 1
  }
}