Pith Number

pith:7ZUOZZ4I

pith:2012:7ZUOZZ4IP6QLZA262RDDTRENVK

not attested not anchored not stored refs pending

Structure on the Top Homology and Related Algorithms

Chandrika Sadanand, Dennis Sullivan, Nissim Ranade

arxiv:1203.5288 v4 · 2012-03-23 · 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{7ZUOZZ4IP6QLZA262RDDTRENVK}

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	2026-07-05T00:22:33.199374Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fe68ece7887fa0bc835ed44639c48daab0188ce5700145d63371a8a77e8907d1

Aliases

arxiv: 1203.5288 · arxiv_version: 1203.5288v4 · doi: 10.48550/arxiv.1203.5288 · pith_short_12: 7ZUOZZ4IP6QL · pith_short_16: 7ZUOZZ4IP6QLZA26 · pith_short_8: 7ZUOZZ4I

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/7ZUOZZ4IP6QLZA262RDDTRENVK \
  | 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: fe68ece7887fa0bc835ed44639c48daab0188ce5700145d63371a8a77e8907d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "660d46f2b6fb94e23bb96e353868b895dff2470735c88501c7c3025887317a63",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2012-03-23T16:35:44Z",
    "title_canon_sha256": "38ef040099dbd2b408130067d5d69db9134f46ded47f8fa5673c5d386dbf22f1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.5288",
    "kind": "arxiv",
    "version": 4
  }
}