Pith Number

pith:7SFQFNFQ

pith:2004:7SFQFNFQEFD6XT22NYDSBB4GNS

not attested not anchored not stored refs pending

Enriched homology and cohomology modules of simplicial complexes

Gunnar Floystad

arxiv:math/0411570 v2 · 2004-11-25 · math.CO · math.AC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7SFQFNFQEFD6XT22NYDSBB4GNS}

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	2026-05-18T04:06:21.485944Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc8b02b4b02147ebcf5a6e072087866cbae449380a6db6d57c80d2e94b6b014c

Aliases

arxiv: math/0411570 · arxiv_version: math/0411570v2 · doi: 10.48550/arxiv.math/0411570 · pith_short_12: 7SFQFNFQEFD6 · pith_short_16: 7SFQFNFQEFD6XT22 · pith_short_8: 7SFQFNFQ

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/7SFQFNFQEFD6XT22NYDSBB4GNS \
  | 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: fc8b02b4b02147ebcf5a6e072087866cbae449380a6db6d57c80d2e94b6b014c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "085da90b814a6d661e8622c321ba445344f127c61684d7bafe318b01dce62322",
    "cross_cats_sorted": [
      "math.AC"
    ],
    "license": "",
    "primary_cat": "math.CO",
    "submitted_at": "2004-11-25T10:46:54Z",
    "title_canon_sha256": "fee4a1957ba142243848d33a631c6045a425f25d2aec25ff5997da274db58965"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0411570",
    "kind": "arxiv",
    "version": 2
  }
}