Pith Number

pith:Q2JDR5OY

pith:2019:Q2JDR5OY7CAJUKFP27PH55X5U4

not attested not anchored not stored refs pending

Homotopy Invariants and Almost Non-Negative Curvature

Giovanni Bazzoni, Gregory Lupton, John Oprea

arxiv:1903.00380 v1 · 2019-03-01 · math.AT · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q2JDR5OY7CAJUKFP27PH55X5U4}

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	2026-05-17T23:52:19.863988Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

869238f5d8f8809a28afd7de7ef6fda7247b1bccda70715ad0528ba7e708c2b1

Aliases

arxiv: 1903.00380 · arxiv_version: 1903.00380v1 · doi: 10.48550/arxiv.1903.00380 · pith_short_12: Q2JDR5OY7CAJ · pith_short_16: Q2JDR5OY7CAJUKFP · pith_short_8: Q2JDR5OY

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/Q2JDR5OY7CAJUKFP27PH55X5U4 \
  | 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: 869238f5d8f8809a28afd7de7ef6fda7247b1bccda70715ad0528ba7e708c2b1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "88462eb3c40ec0b1440c0c89278d8cd0181230c0d9b196768bc5749dc18f8909",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2019-03-01T15:52:34Z",
    "title_canon_sha256": "10ce1ef7fdfe97df9dec51ad8ff0a8abdca50e3c476ff0ff0c7b619b3998c63f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.00380",
    "kind": "arxiv",
    "version": 1
  }
}