Pith Number

pith:4NDJYSFC

pith:2018:4NDJYSFCGKQAGFBIN5I6PV32XI

not attested not anchored not stored refs pending

The upper Vietoris topology on the space of inverse-closed subsets of a spectral space and applications

Carmelo A. Finocchiaro, Dario Spirito, Marco Fontana

arxiv:1805.12454 v1 · 2018-05-31 · math.GN · 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{4NDJYSFCGKQAGFBIN5I6PV32XI}

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	2026-05-18T00:14:30.147507Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e3469c48a232a00314286f51e7d77aba19f80c169a0b02ebb00b9a2096039f78

Aliases

arxiv: 1805.12454 · arxiv_version: 1805.12454v1 · doi: 10.48550/arxiv.1805.12454 · pith_short_12: 4NDJYSFCGKQA · pith_short_16: 4NDJYSFCGKQAGFBI · pith_short_8: 4NDJYSFC

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/4NDJYSFCGKQAGFBIN5I6PV32XI \
  | 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: e3469c48a232a00314286f51e7d77aba19f80c169a0b02ebb00b9a2096039f78

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1135ae7f14c9d2e5fdc938a26e33d6886481c90a1802193ab84e47b08eaa6aae",
    "cross_cats_sorted": [
      "math.AC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GN",
    "submitted_at": "2018-05-31T13:16:31Z",
    "title_canon_sha256": "1e44e85a892110967ca017c1ee913ff3041baf29d37a393c247881ea1e4ff028"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.12454",
    "kind": "arxiv",
    "version": 1
  }
}