Pith Number

pith:OV5JPABU

pith:2019:OV5JPABUM4YZJY7KDN4HJF457U

not attested not anchored not stored refs pending

$A_\infty$ persistent homology estimates the topology from pointcloud datasets

Anastasios Stefanou, Francisco Belch\'i

arxiv:1902.09138 v1 · 2019-02-25 · 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{OV5JPABUM4YZJY7KDN4HJF457U}

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	2026-05-17T23:52:46.537351Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

757a978034673194e3ea1b7874979dfd365ef4ff0b603a6bc9e75cd8e9eee811

Aliases

arxiv: 1902.09138 · arxiv_version: 1902.09138v1 · doi: 10.48550/arxiv.1902.09138 · pith_short_12: OV5JPABUM4YZ · pith_short_16: OV5JPABUM4YZJY7K · pith_short_8: OV5JPABU

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/OV5JPABUM4YZJY7KDN4HJF457U \
  | 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: 757a978034673194e3ea1b7874979dfd365ef4ff0b603a6bc9e75cd8e9eee811

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f98dc1c42b43c30efbb8eba72aac537b84223b7750ff33d5b388d106f04db3b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2019-02-25T08:35:52Z",
    "title_canon_sha256": "b3e0ea25124de72c6920a42c6892445b6a0da616c68c5fa9cc8cc330c8c89499"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.09138",
    "kind": "arxiv",
    "version": 1
  }
}