Pith Number

pith:S2XWS74H

pith:2011:S2XWS74HFPBMLXMT45IWYMA44D

not attested not anchored not stored refs pending

The classification of weighted projective spaces

Anthony Bahri, Dietrich Notbohm, Matthias Franz, Nigel Ray

arxiv:1108.1938 v4 · 2011-08-09 · math.AT · 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{S2XWS74HFPBMLXMT45IWYMA44D}

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	2026-05-18T03:29:40.870792Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

96af697f872bc2c5dd93e7516c301ce0c7557777cc2f151ddb145938453da503

Aliases

arxiv: 1108.1938 · arxiv_version: 1108.1938v4 · doi: 10.48550/arxiv.1108.1938 · pith_short_12: S2XWS74HFPBM · pith_short_16: S2XWS74HFPBMLXMT · pith_short_8: S2XWS74H

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/S2XWS74HFPBMLXMT45IWYMA44D \
  | 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: 96af697f872bc2c5dd93e7516c301ce0c7557777cc2f151ddb145938453da503

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48524606d5b25e08f36e6e5bb2f8d1ed508872934e8c84e188505af61d198e17",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2011-08-09T14:31:49Z",
    "title_canon_sha256": "7e44e732ef1c66ade88e89acd12a12139d668ac94b705d3d406d64d5861c3161"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.1938",
    "kind": "arxiv",
    "version": 4
  }
}