Pith Number

pith:E4HYEEXD

pith:2014:E4HYEEXDATLZ6JLHQLMEMZWXUE

not attested not anchored not stored refs pending

Geometric Homology

Max Lipyanskiy

arxiv:1409.1121 v1 · 2014-09-03 · math.AT · math.SG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E4HYEEXDATLZ6JLHQLMEMZWXUE}

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	2026-05-18T02:43:44.295872Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

270f8212e304d79f256782d84666d7a12302e5bcb4d47778a1defeed01aa363a

Aliases

arxiv: 1409.1121 · arxiv_version: 1409.1121v1 · doi: 10.48550/arxiv.1409.1121 · pith_short_12: E4HYEEXDATLZ · pith_short_16: E4HYEEXDATLZ6JLH · pith_short_8: E4HYEEXD

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/E4HYEEXDATLZ6JLHQLMEMZWXUE \
  | 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: 270f8212e304d79f256782d84666d7a12302e5bcb4d47778a1defeed01aa363a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fdf31fdde00b579a7236d3fbf6492fe3391cc090566cb2bbd2163db1bde4141d",
    "cross_cats_sorted": [
      "math.SG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2014-09-03T15:19:06Z",
    "title_canon_sha256": "da0d2158c0aff02dfffb7d1d857ce06446527e9f2ded436007e5497d1244c1ac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.1121",
    "kind": "arxiv",
    "version": 1
  }
}