Pith Number

pith:OUOFRZDK

pith:2010:OUOFRZDKQHLAYUOMPFHLEZJAFY

not attested not anchored not stored refs pending

Classifying spaces and fibrations of simplicial sheaves

Matthias Wendt

arxiv:1009.2930 v3 · 2010-09-15 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OUOFRZDKQHLAYUOMPFHLEZJAFY}

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	2026-05-18T03:57:14.402429Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

751c58e46a81d60c51cc794eb265202e1f47ea58acddeb2f513b231c517daefd

Aliases

arxiv: 1009.2930 · arxiv_version: 1009.2930v3 · doi: 10.48550/arxiv.1009.2930 · pith_short_12: OUOFRZDKQHLA · pith_short_16: OUOFRZDKQHLAYUOM · pith_short_8: OUOFRZDK

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/OUOFRZDKQHLAYUOMPFHLEZJAFY \
  | 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: 751c58e46a81d60c51cc794eb265202e1f47ea58acddeb2f513b231c517daefd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "532eb70f34deafb79148b7f583d146a0d1b4387d020a542f1c9d9dfeee481b37",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2010-09-15T13:58:55Z",
    "title_canon_sha256": "ac8ced225afeee18aeb7ec02f4d9cc47d07c3de9b435cb264b6c742e4bcf6c4f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.2930",
    "kind": "arxiv",
    "version": 3
  }
}