Pith Number

pith:MDCLDOPC

pith:2018:MDCLDOPC76IYHE3RWK2LFYO4YJ

not attested not anchored not stored refs pending

Certified Mapper: Repeated testing for acyclicity and obstructions to the nerve lemma

Alisa Leshchenko, Mikael Vejdemo-Johansson

arxiv:1808.09933 v1 · 2018-08-29 · math.AT · cs.LG · math.ST · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MDCLDOPC76IYHE3RWK2LFYO4YJ}

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	2026-05-18T00:06:53.928221Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

60c4b1b9e2ff91839371b2b4b2e1dcc27b7d1351a3bd10fbb2ef7c641e0579d4

Aliases

arxiv: 1808.09933 · arxiv_version: 1808.09933v1 · doi: 10.48550/arxiv.1808.09933 · pith_short_12: MDCLDOPC76IY · pith_short_16: MDCLDOPC76IYHE3R · pith_short_8: MDCLDOPC

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/MDCLDOPC76IYHE3RWK2LFYO4YJ \
  | 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: 60c4b1b9e2ff91839371b2b4b2e1dcc27b7d1351a3bd10fbb2ef7c641e0579d4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cb27bf51751c90810552835924c5276931593c368b0a54d0deafbf0b9a755398",
    "cross_cats_sorted": [
      "cs.LG",
      "math.ST",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2018-08-29T17:21:17Z",
    "title_canon_sha256": "2097a226392feac621b7c524bb2707013352b1412600c2774be97b87e8c8c2f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.09933",
    "kind": "arxiv",
    "version": 1
  }
}