Pith Number

pith:QERPV45H

pith:2014:QERPV45HDHWOVHKLSB47ZXXV7M

not attested not anchored not stored refs pending

Homotopy limits of spaces, connectivity and cofinality

Emanuele Dotto

arxiv:1403.0839 v3 · 2014-03-04 · 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{QERPV45HDHWOVHKLSB47ZXXV7M}

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	2026-05-18T02:54:46.465287Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8122faf3a719ecea9d4b9079fcdef5fb1f076c348e0a59ff4b17f37aa1ec9e85

Aliases

arxiv: 1403.0839 · arxiv_version: 1403.0839v3 · doi: 10.48550/arxiv.1403.0839 · pith_short_12: QERPV45HDHWO · pith_short_16: QERPV45HDHWOVHKL · pith_short_8: QERPV45H

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/QERPV45HDHWOVHKLSB47ZXXV7M \
  | 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: 8122faf3a719ecea9d4b9079fcdef5fb1f076c348e0a59ff4b17f37aa1ec9e85

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "353a26915af4992564f1dd424f5cc1a052bd420d1942a531626f4b2f7709f6fa",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2014-03-04T16:23:13Z",
    "title_canon_sha256": "8bce44a34c2939ae7ad0e6d9479b1fec7708c185094992fee9f425706011ffdf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.0839",
    "kind": "arxiv",
    "version": 3
  }
}