Pith Number

pith:QK4UQQP7

pith:2018:QK4UQQP7WYV3JIGF3TDXCTS65M

not attested not anchored not stored refs pending

Local Coefficients Revisited

Fang Sun, Slawomir Kwasik

arxiv:1801.01148 v1 · 2018-01-03 · 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{QK4UQQP7WYV3JIGF3TDXCTS65M}

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	2026-05-18T00:26:42.986100Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

82b94841ffb62bb4a0c5dcc7714e5eeb20365ff83de4561a732974ffb2b69500

Aliases

arxiv: 1801.01148 · arxiv_version: 1801.01148v1 · doi: 10.48550/arxiv.1801.01148 · pith_short_12: QK4UQQP7WYV3 · pith_short_16: QK4UQQP7WYV3JIGF · pith_short_8: QK4UQQP7

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/QK4UQQP7WYV3JIGF3TDXCTS65M \
  | 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: 82b94841ffb62bb4a0c5dcc7714e5eeb20365ff83de4561a732974ffb2b69500

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d37eef90d4231b92edabe12a48ea902c599c079d3d9ca6091860c7f8eb9cef9c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2018-01-03T19:29:14Z",
    "title_canon_sha256": "98d51d789b64f788bb6d6aa2f46cd3125a6e5c56264ab4393bf091a415ded631"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.01148",
    "kind": "arxiv",
    "version": 1
  }
}