Pith Number

pith:YU3ZA6ZO

pith:2013:YU3ZA6ZOWLKNWVSPNMHYE4LIKY

not attested not anchored not stored refs pending

Geometric homology revisited

Fabio Ferrari Ruffino

arxiv:1301.5882 v1 · 2013-01-24 · math.AT · 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{YU3ZA6ZOWLKNWVSPNMHYE4LIKY}

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	2026-05-18T03:35:37.070950Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c537907b2eb2d4db564f6b0f82716856196315b86e11e60134a0a45fbdd181c3

Aliases

arxiv: 1301.5882 · arxiv_version: 1301.5882v1 · doi: 10.48550/arxiv.1301.5882 · pith_short_12: YU3ZA6ZOWLKN · pith_short_16: YU3ZA6ZOWLKNWVSP · pith_short_8: YU3ZA6ZO

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/YU3ZA6ZOWLKNWVSPNMHYE4LIKY \
  | 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: c537907b2eb2d4db564f6b0f82716856196315b86e11e60134a0a45fbdd181c3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee9a316f89e4bfb616cac25f4c7089e14519699533b30094ef3d3423d4cc0f14",
    "cross_cats_sorted": [
      "math.KT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2013-01-24T20:11:05Z",
    "title_canon_sha256": "3b79c1223f63914abbfbca9baac05d9133987e2d3b856f66e7de2be2ef8bc885"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.5882",
    "kind": "arxiv",
    "version": 1
  }
}