Pith Number

pith:SBPOIQC2

pith:2010:SBPOIQC2GO5574M42SOLAWXUTZ

not attested not anchored not stored refs pending

Central extensions of loop groups and obstruction to pre-quantization

Derek Krepski

arxiv:1004.2278 v2 · 2010-04-13 · math.SG · math-ph · math.MP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SBPOIQC2GO5574M42SOLAWXUTZ}

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	2026-05-18T04:40:45.102976Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

905ee4405a33bbdff19cd49cb05af49e585594273ec0e4c85aebd3ad43537ea7

Aliases

arxiv: 1004.2278 · arxiv_version: 1004.2278v2 · doi: 10.48550/arxiv.1004.2278 · pith_short_12: SBPOIQC2GO55 · pith_short_16: SBPOIQC2GO5574M4 · pith_short_8: SBPOIQC2

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/SBPOIQC2GO5574M42SOLAWXUTZ \
  | 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: 905ee4405a33bbdff19cd49cb05af49e585594273ec0e4c85aebd3ad43537ea7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cfb118602c1d052a7bf489725ba098fbcc733e10aeaa4b7068a71811f8a1c4ba",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SG",
    "submitted_at": "2010-04-13T22:03:07Z",
    "title_canon_sha256": "13a23bf880db48982df4bfd3b5628a90c8a4a2510d40cecdac62ff012465346e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1004.2278",
    "kind": "arxiv",
    "version": 2
  }
}