Pith Number

pith:NF7FYEQ2

pith:2014:NF7FYEQ2OXSHKGY3KH6JPTZGXF

not attested not anchored not stored refs pending

Topological invariance of the homological index

Alan Carey, Jens Kaad

arxiv:1402.0475 v1 · 2014-02-03 · math.KT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NF7FYEQ2OXSHKGY3KH6JPTZGXF}

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	2026-05-18T03:00:15.194167Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

697e5c121a75e4751b1b51fc97cf26b94604124c918f33f982a691f5fba5c451

Aliases

arxiv: 1402.0475 · arxiv_version: 1402.0475v1 · doi: 10.48550/arxiv.1402.0475 · pith_short_12: NF7FYEQ2OXSH · pith_short_16: NF7FYEQ2OXSHKGY3 · pith_short_8: NF7FYEQ2

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/NF7FYEQ2OXSHKGY3KH6JPTZGXF \
  | 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: 697e5c121a75e4751b1b51fc97cf26b94604124c918f33f982a691f5fba5c451

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee3e75756f7d81bcbb30dd5530b9f2ad281cfb2fdf8f410a211f53d80a856714",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2014-02-03T19:27:43Z",
    "title_canon_sha256": "1e1491d755c0898d3d19afda40cfaad3e3aca64ca478b733d3b5c4ca51bf5fae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.0475",
    "kind": "arxiv",
    "version": 1
  }
}