Pith Number

pith:6EHBKKZF

pith:2023:6EHBKKZFBQVR42XPAS3VKCTQQK

not attested not anchored not stored refs pending

Surjective rational maps and del Pezzo surfaces

Anna Lekontseva, Ilya Karzhemanov

arxiv:2311.01835 v4 · 2023-11-03 · 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{6EHBKKZFBQVR42XPAS3VKCTQQK}

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	2026-07-05T11:13:54.776284Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f10e152b250c2b1e6aef04b7550a708294291406b576592f122ee474a55a1e4c

Aliases

arxiv: 2311.01835 · arxiv_version: 2311.01835v4 · doi: 10.48550/arxiv.2311.01835 · pith_short_12: 6EHBKKZFBQVR · pith_short_16: 6EHBKKZFBQVR42XP · pith_short_8: 6EHBKKZF

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/6EHBKKZFBQVR42XPAS3VKCTQQK \
  | 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: f10e152b250c2b1e6aef04b7550a708294291406b576592f122ee474a55a1e4c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5fd640a4310084f0e70ec08f0d2921b38776f9d3c214dd2cce2acd8f7434677d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2023-11-03T10:42:32Z",
    "title_canon_sha256": "daa5f2d83c63fac7a33b39d671f8162a39df2b7e6a5fb1d1da14a165cb43de4f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2311.01835",
    "kind": "arxiv",
    "version": 4
  }
}