Pith Number

pith:T5EBI3IS

pith:2018:T5EBI3ISEVAZL5SJBYCCXWIZ36

not attested not anchored not stored refs pending

Brauer groups of involution surface bundles

Andrew Kresch, Yuri Tschinkel

arxiv:1809.05458 v1 · 2018-09-14 · 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{T5EBI3ISEVAZL5SJBYCCXWIZ36}

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	2026-05-18T00:05:41.358976Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f48146d12254195f6490e042bd919dfba8e709f2b742f1ef0305ba298849b00

Aliases

arxiv: 1809.05458 · arxiv_version: 1809.05458v1 · doi: 10.48550/arxiv.1809.05458 · pith_short_12: T5EBI3ISEVAZ · pith_short_16: T5EBI3ISEVAZL5SJ · pith_short_8: T5EBI3IS

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/T5EBI3ISEVAZL5SJBYCCXWIZ36 \
  | 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: 9f48146d12254195f6490e042bd919dfba8e709f2b742f1ef0305ba298849b00

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "86aa7248dffafd3defc17ac8e3e9525bf4a7afa7db4dcf61eac89ed92d6d50f9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2018-09-14T15:12:40Z",
    "title_canon_sha256": "4cdd4367fadb755dd6eae57aec2f5331ed4922926ca8052229c7fe4065da4c0a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.05458",
    "kind": "arxiv",
    "version": 1
  }
}