Pith Number

pith:Q77AALYZ

pith:2009:Q77AALYZ472ZAAGHVGJOYWWFAY

not attested not anchored not stored refs pending

Nerves and classifying spaces for bicategories

A.M. Cegarra, A.R. Garz\'on, P. Carrasco

arxiv:0903.5058 v1 · 2009-03-30 · math.AT · math.CT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q77AALYZ472ZAAGHVGJOYWWFAY}

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	2026-05-18T02:41:51.304436Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

87fe002f19e7f59000c7a992ec5ac50639fa6ee480388b14ccbf46277084d85d

Aliases

arxiv: 0903.5058 · arxiv_version: 0903.5058v1 · doi: 10.48550/arxiv.0903.5058 · pith_short_12: Q77AALYZ472Z · pith_short_16: Q77AALYZ472ZAAGH · pith_short_8: Q77AALYZ

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/Q77AALYZ472ZAAGHVGJOYWWFAY \
  | 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: 87fe002f19e7f59000c7a992ec5ac50639fa6ee480388b14ccbf46277084d85d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "393206e83ad5420a33d666a231a71d24a46f72e46c2e90673eca0588bd6d8047",
    "cross_cats_sorted": [
      "math.CT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2009-03-30T15:40:03Z",
    "title_canon_sha256": "a0a9dd25e057debbccbeebbb9212feb4c4d4e31d26cd9a77c78507e11423dca1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.5058",
    "kind": "arxiv",
    "version": 1
  }
}