Pith Number

pith:NJQMPOSR

pith:2017:NJQMPOSRNMBIXZD5XNYLPNEMBZ

not attested not anchored not stored refs pending

On the complexity of optimal homotopies

Arnaud de Mesmay, Erin Wolf Chambers, Tim Ophelders

arxiv:1711.00788 v1 · 2017-11-02 · cs.CG · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NJQMPOSRNMBIXZD5XNYLPNEMBZ}

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	2026-05-18T00:31:29.538623Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a60c7ba516b028be47dbb70b7b48c0e536439335ebaad00cbcd518c37f97454

Aliases

arxiv: 1711.00788 · arxiv_version: 1711.00788v1 · doi: 10.48550/arxiv.1711.00788 · pith_short_12: NJQMPOSRNMBI · pith_short_16: NJQMPOSRNMBIXZD5 · pith_short_8: NJQMPOSR

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/NJQMPOSRNMBIXZD5XNYLPNEMBZ \
  | 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: 6a60c7ba516b028be47dbb70b7b48c0e536439335ebaad00cbcd518c37f97454

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "505ee0232f461c4d44c7215501a4c80d90f915ede841918331f5f01fadf0bd65",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2017-11-02T15:49:59Z",
    "title_canon_sha256": "5d1bd55b9ff4d08c6b3d7c248a132481305ad72fdd035b1f2d4ca564b51f83ba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.00788",
    "kind": "arxiv",
    "version": 1
  }
}