Pith Number

pith:UUN4XIJZ

pith:2018:UUN4XIJZTWCD2FTUC7V6QFXZLX

not attested not anchored not stored refs pending

Efficient algorithms for computing a minimal homology basis

Tamal K. Dey, Tianqi Li, Yusu Wang

arxiv:1801.06759 v1 · 2018-01-21 · math.AT · cs.CG · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UUN4XIJZTWCD2FTUC7V6QFXZLX}

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	2026-05-18T00:24:59.142007Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a51bcba1399d843d167417ebe816f95dd669727123b27670b6148ff1a59c44f9

Aliases

arxiv: 1801.06759 · arxiv_version: 1801.06759v1 · doi: 10.48550/arxiv.1801.06759 · pith_short_12: UUN4XIJZTWCD · pith_short_16: UUN4XIJZTWCD2FTU · pith_short_8: UUN4XIJZ

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/UUN4XIJZTWCD2FTUC7V6QFXZLX \
  | 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: a51bcba1399d843d167417ebe816f95dd669727123b27670b6148ff1a59c44f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "66426f717fd45d5db64f5cb8eae68660c67a52a4930fc63d75704ee3d0086a9e",
    "cross_cats_sorted": [
      "cs.CG",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2018-01-21T03:37:26Z",
    "title_canon_sha256": "d0cbd99a2e567e7d3b408adc36d228eca11c3dada473c83bf7de1cfedbaabca3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.06759",
    "kind": "arxiv",
    "version": 1
  }
}