Pith Number

pith:BP6LC26H

pith:2018:BP6LC26H4BFULSYXCZUG4KJJHF

not attested not anchored not stored refs pending

Cancellation for surfaces revisited. II

Hubert Flenner, Mikhail Zaidenberg, Shulim Kaliman

arxiv:1801.02274 v2 · 2018-01-07 · 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{BP6LC26H4BFULSYXCZUG4KJJHF}

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	2026-05-18T00:19:11.188286Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0bfcb16bc7e04b45cb1716686e292939416066222baac8b50903c7ddbe6429eb

Aliases

arxiv: 1801.02274 · arxiv_version: 1801.02274v2 · doi: 10.48550/arxiv.1801.02274 · pith_short_12: BP6LC26H4BFU · pith_short_16: BP6LC26H4BFULSYX · pith_short_8: BP6LC26H

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/BP6LC26H4BFULSYXCZUG4KJJHF \
  | 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: 0bfcb16bc7e04b45cb1716686e292939416066222baac8b50903c7ddbe6429eb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3d9b5938f0cab759f4237646733fb825da7da5e3aae2d4ca32076faac14cac37",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2018-01-07T23:41:12Z",
    "title_canon_sha256": "8c881c6f64b89eb3699cf35c86954f68152d8c371bafb867eb6165045122fcd2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.02274",
    "kind": "arxiv",
    "version": 2
  }
}