Pith Number

pith:GSY7XBLW

pith:2014:GSY7XBLW7O5VQQXK3NSFDMI75F

not attested not anchored not stored refs pending

Motivic classes of some classifying stacks

Daniel Bergh

arxiv:1409.5404 v2 · 2014-09-18 · 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{GSY7XBLW7O5VQQXK3NSFDMI75F}

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	2026-05-18T00:08:24.368959Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

34b1fb8576fbbb5842eadb6451b11fe9506b045f6e54600db1c828314245d212

Aliases

arxiv: 1409.5404 · arxiv_version: 1409.5404v2 · doi: 10.48550/arxiv.1409.5404 · pith_short_12: GSY7XBLW7O5V · pith_short_16: GSY7XBLW7O5VQQXK · pith_short_8: GSY7XBLW

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/GSY7XBLW7O5VQQXK3NSFDMI75F \
  | 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: 34b1fb8576fbbb5842eadb6451b11fe9506b045f6e54600db1c828314245d212

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "886389409514abac7643e844e2a5be89326fcc288573fa39e444260809acffc8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2014-09-18T18:35:31Z",
    "title_canon_sha256": "3d2cd2211299488ebb2becb5b9e8058cfd64c0a8f0ccd632069f8c1106b83063"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.5404",
    "kind": "arxiv",
    "version": 2
  }
}