Pith Number

pith:GUQTG4R4

pith:2012:GUQTG4R4W2VAC2ZQTZ6AEV73MP

not attested not anchored not stored refs pending

On the classification of fibrations

Martin Blomgren, Wojciech Chacholski

arxiv:1206.4443 v1 · 2012-06-20 · 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{GUQTG4R4W2VAC2ZQTZ6AEV73MP}

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	2026-05-18T03:53:05.838035Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

352133723cb6aa016b309e7c0257fb63cf05daa653bc16ccc93af9dfc9df16ff

Aliases

arxiv: 1206.4443 · arxiv_version: 1206.4443v1 · doi: 10.48550/arxiv.1206.4443 · pith_short_12: GUQTG4R4W2VA · pith_short_16: GUQTG4R4W2VAC2ZQ · pith_short_8: GUQTG4R4

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/GUQTG4R4W2VAC2ZQTZ6AEV73MP \
  | 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: 352133723cb6aa016b309e7c0257fb63cf05daa653bc16ccc93af9dfc9df16ff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dc07b0cded145a7c1667bd513a9d94bbdb75d04b82490d17848110eed385cfc0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2012-06-20T10:18:57Z",
    "title_canon_sha256": "d611165c0c64fa61b86278cc475d17f156fe8d77f34f84c86d627300b067051f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1206.4443",
    "kind": "arxiv",
    "version": 1
  }
}