Pith Number

pith:YVBZU62Q

pith:2025:YVBZU62QEOC27766YNZZ75QU4S

not attested not anchored not stored refs pending

The irreducibility of Hurwitz spaces and Severi varieties on toric surfaces

Ilya Tyomkin, Karl Christ, Xiang He

arxiv:2501.16238 v2 · 2025-01-27 · 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{YVBZU62QEOC27766YNZZ75QU4S}

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	2026-05-26T01:03:10.729527Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c5439a7b502385afffdec3739ff614e4a8afa160f8f94ff93230e8a302ddecab

Aliases

arxiv: 2501.16238 · arxiv_version: 2501.16238v2 · doi: 10.48550/arxiv.2501.16238 · pith_short_12: YVBZU62QEOC2 · pith_short_16: YVBZU62QEOC27766 · pith_short_8: YVBZU62Q

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/YVBZU62QEOC27766YNZZ75QU4S \
  | 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: c5439a7b502385afffdec3739ff614e4a8afa160f8f94ff93230e8a302ddecab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e360c4f380d3a3a53666845690992d17a8c4144dbc9e640d2e999c2926d8bf0",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2025-01-27T17:34:16Z",
    "title_canon_sha256": "3e9bfd468b63872999b0630ff947589e04033e97a6202b7b8915f3589f4b9f12"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.16238",
    "kind": "arxiv",
    "version": 2
  }
}