Pith Number

pith:33G6F2Z7

pith:2016:33G6F2Z7TOI2UDATN5OOS6ZLNS

not attested not anchored not stored refs pending

Computing the Homology of Real Projective Sets

Felipe Cucker, Michael Shub, Teresa Krick

arxiv:1602.02094 v2 · 2016-02-05 · math.AG · math.AT · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{33G6F2Z7TOI2UDATN5OOS6ZLNS}

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	2026-05-18T00:44:37.198116Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

decde2eb3f9b91aa0c136f5ce97b2b6cab73aab274156d2719a136a766c67050

Aliases

arxiv: 1602.02094 · arxiv_version: 1602.02094v2 · doi: 10.48550/arxiv.1602.02094 · pith_short_12: 33G6F2Z7TOI2 · pith_short_16: 33G6F2Z7TOI2UDAT · pith_short_8: 33G6F2Z7

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/33G6F2Z7TOI2UDATN5OOS6ZLNS \
  | 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: decde2eb3f9b91aa0c136f5ce97b2b6cab73aab274156d2719a136a766c67050

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "166f3d80163fcee55cceaa7fedab3f7aa42e51ab14a4d62ed93005e78640d927",
    "cross_cats_sorted": [
      "math.AT",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2016-02-05T16:53:33Z",
    "title_canon_sha256": "a575e38abadd12e91ef9278f96b3f0e9cd68b400b31f6c626c7e64a91318b7b2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.02094",
    "kind": "arxiv",
    "version": 2
  }
}