Pith Number

pith:TWB5YZQU

pith:2008:TWB5YZQUNH2TFXSJEU3RJYOUFG

not attested not anchored not stored refs pending

Integer Cech Cohomology of Icosahedral Projection Tilings

F. G\"ahler, J. Hunton, J. Kellendonk

arxiv:0809.4442 v1 · 2008-09-25 · math.DS · 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{TWB5YZQUNH2TFXSJEU3RJYOUFG}

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	2026-05-18T04:02:25.483564Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9d83dc661469f532de49253714e1d429a0c590be2073dbe4aaa87c8f3bf1376b

Aliases

arxiv: 0809.4442 · arxiv_version: 0809.4442v1 · doi: 10.48550/arxiv.0809.4442 · pith_short_12: TWB5YZQUNH2T · pith_short_16: TWB5YZQUNH2TFXSJ · pith_short_8: TWB5YZQU

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/TWB5YZQUNH2TFXSJEU3RJYOUFG \
  | 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: 9d83dc661469f532de49253714e1d429a0c590be2073dbe4aaa87c8f3bf1376b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8ee01b0ee5413b688c7444cff23486efe124b9690d17bdfd0492e9bf19de4e18",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2008-09-25T15:54:26Z",
    "title_canon_sha256": "eae1cbcdf73492e400ea96c39a621e4453083a7c962597c52a6c7590b1883e30"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.4442",
    "kind": "arxiv",
    "version": 1
  }
}