Pith Number

pith:2ELTVYUS

pith:2026:2ELTVYUSGDSR4SGHUDWO5OAE63

not attested not anchored not stored refs pending

Composition of Sarkisov links between del Pezzo surfaces

Anastasia V. Vikulova

arxiv:2607.13270 v1 · 2026-07-14 · 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{2ELTVYUSGDSR4SGHUDWO5OAE63}

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	2026-07-16T00:22:06.800536Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1173ae29230e51e48c7a0eceeb804f6e666509dbbb57a515c997b48d3a50e40

Aliases

arxiv: 2607.13270 · arxiv_version: 2607.13270v1 · doi: 10.48550/arxiv.2607.13270 · pith_short_12: 2ELTVYUSGDSR · pith_short_16: 2ELTVYUSGDSR4SGH · pith_short_8: 2ELTVYUS

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/2ELTVYUSGDSR4SGHUDWO5OAE63 \
  | 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: d1173ae29230e51e48c7a0eceeb804f6e666509dbbb57a515c997b48d3a50e40

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d14dfa1cc0ce1e7d4dc6393ff9298eb88ce2694e641e346b48ce6574f2149a6",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2026-07-14T21:10:33Z",
    "title_canon_sha256": "a69294d4efe6d8dfbc3b1d30b35906b9bf23e096b94c698dad5ee724289d065c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.13270",
    "kind": "arxiv",
    "version": 1
  }
}