Pith Number

pith:EPUL7MT5

pith:2011:EPUL7MT5BLJE7SYCQD5JFN6D3X

not attested not anchored not stored refs pending

Simplicial Homeology and Homeotopy

Feifei Fan, Qibing Zheng

arxiv:1107.0232 v1 · 2011-07-01 · 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{EPUL7MT5BLJE7SYCQD5JFN6D3X}

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	2026-05-18T04:19:02.419493Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

23e8bfb27d0ad24fcb0280fa92b7c3dde65b6c54abab45455f1e5540cb026b45

Aliases

arxiv: 1107.0232 · arxiv_version: 1107.0232v1 · doi: 10.48550/arxiv.1107.0232 · pith_short_12: EPUL7MT5BLJE · pith_short_16: EPUL7MT5BLJE7SYC · pith_short_8: EPUL7MT5

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/EPUL7MT5BLJE7SYCQD5JFN6D3X \
  | 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: 23e8bfb27d0ad24fcb0280fa92b7c3dde65b6c54abab45455f1e5540cb026b45

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7595b497bf6ee56507af2225e47e9104e4b65daa767c4490dae8346d455f4c48",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2011-07-01T14:13:01Z",
    "title_canon_sha256": "47b2c9bdd1a83308a01ca9c44f1d8c34bd098a1e2077d22199258802de70e71a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.0232",
    "kind": "arxiv",
    "version": 1
  }
}