Pith Number

pith:7W2D2D23

pith:2018:7W2D2D23OCD5RH7F2X5LCCOIYY

not attested not anchored not stored refs pending

Homology groups of cubical sets with connections

Abdul Salam Jarrah, Curtis Greene, Helene Barcelo, Volkmar Welker

arxiv:1812.07600 v1 · 2018-12-18 · math.AT · math.CO · math.CT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7W2D2D23OCD5RH7F2X5LCCOIYY}

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	2026-05-17T23:57:56.613985Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fdb43d0f5b7087d89fe5d5fab109c8c620a921a716ea8a43038174e4c3eb2156

Aliases

arxiv: 1812.07600 · arxiv_version: 1812.07600v1 · doi: 10.48550/arxiv.1812.07600 · pith_short_12: 7W2D2D23OCD5 · pith_short_16: 7W2D2D23OCD5RH7F · pith_short_8: 7W2D2D23

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/7W2D2D23OCD5RH7F2X5LCCOIYY \
  | 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: fdb43d0f5b7087d89fe5d5fab109c8c620a921a716ea8a43038174e4c3eb2156

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4afcd5057482fa60ed531d76f75ce2ffc93c4ab603bdab70b03cc1349385c14",
    "cross_cats_sorted": [
      "math.CO",
      "math.CT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2018-12-18T19:07:33Z",
    "title_canon_sha256": "cdee2c294af58da96ba42807caac544dd6be2b433307c34cf4aa5f4df5b2c2b6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.07600",
    "kind": "arxiv",
    "version": 1
  }
}