Pith Number

pith:FG72FE5D

pith:2025:FG72FE5DJQMNXFLWKE7PAQABAB

not attested not anchored not stored refs pending

Cohomological obstructions to equivariant unirationality

Yuri Tschinkel, Zhijia Zhang

arxiv:2504.10204 v1 · 2025-04-14 · 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{FG72FE5DJQMNXFLWKE7PAQABAB}

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

Linearizability notions in equivariant birational geometry

Receipt and verification

First computed	2026-07-05T10:48:49.005227Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29bfa293a34c18db9576513ef04001006ef9b5b6ed4d648f4cb8ea5430dcad95

Aliases

arxiv: 2504.10204 · arxiv_version: 2504.10204v1 · doi: 10.48550/arxiv.2504.10204 · pith_short_12: FG72FE5DJQMN · pith_short_16: FG72FE5DJQMNXFLW · pith_short_8: FG72FE5D

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/FG72FE5DJQMNXFLWKE7PAQABAB \
  | 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: 29bfa293a34c18db9576513ef04001006ef9b5b6ed4d648f4cb8ea5430dcad95

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "71abfb87271d4607127663ca056a2336a2c97a44ecf34d5e8502afcd73dc6a05",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2025-04-14T13:12:54Z",
    "title_canon_sha256": "3b1faeaab7b5dd22968b14801803ab42606f5ed960419cdd4c01e0f0d67183c8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2504.10204",
    "kind": "arxiv",
    "version": 1
  }
}