Pith Number

pith:OJEKZMY6

pith:2018:OJEKZMY6W4U5SE2ZI35QMXJHBK

not attested not anchored not stored refs pending

Sparse Filtered Nerves

Morten Brun, Nello Blaser

arxiv:1810.02149 v2 · 2018-10-04 · 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{OJEKZMY6W4U5SE2ZI35QMXJHBK}

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	2026-05-17T23:47:53.854376Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7248acb31eb729d9135946fb065d270a895bc41f83f2e8b1040e2705fdced8df

Aliases

arxiv: 1810.02149 · arxiv_version: 1810.02149v2 · doi: 10.48550/arxiv.1810.02149 · pith_short_12: OJEKZMY6W4U5 · pith_short_16: OJEKZMY6W4U5SE2Z · pith_short_8: OJEKZMY6

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/OJEKZMY6W4U5SE2ZI35QMXJHBK \
  | 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: 7248acb31eb729d9135946fb065d270a895bc41f83f2e8b1040e2705fdced8df

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9bf66c4f2851a7857c1c00f20ccb0ae218181d6b2f8071c9f70efbe0b0354aa0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2018-10-04T11:29:42Z",
    "title_canon_sha256": "bcfe15c12d65a2d870e22cdb9f8eab4e3377a749001b46cedcbcc52c259e2678"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.02149",
    "kind": "arxiv",
    "version": 2
  }
}