Pith Number

pith:H4XWIOJZ

pith:2018:H4XWIOJZ263OCENKB6WUDKIKKL

not attested not anchored not stored refs pending

On Visibility Problems with an Infinite Discrete, set of Obstacles

Michael Boshernitzan, Yaar Solomon

arxiv:1805.11679 v1 · 2018-05-29 · math.MG · cs.CG · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{H4XWIOJZ263OCENKB6WUDKIKKL}

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	2026-05-18T00:14:37.004812Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f2f643939d7b6e111aa0fad41a90a52e8545ef7452bb72cffbeea3cef7393a7

Aliases

arxiv: 1805.11679 · arxiv_version: 1805.11679v1 · doi: 10.48550/arxiv.1805.11679 · pith_short_12: H4XWIOJZ263O · pith_short_16: H4XWIOJZ263OCENK · pith_short_8: H4XWIOJZ

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/H4XWIOJZ263OCENKB6WUDKIKKL \
  | 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: 3f2f643939d7b6e111aa0fad41a90a52e8545ef7452bb72cffbeea3cef7393a7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ad3ad1a370247ff33c0a4dcad0171ec0b494fa157218c4f0ebdfff2f1ce668f5",
    "cross_cats_sorted": [
      "cs.CG",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2018-05-29T19:31:02Z",
    "title_canon_sha256": "ee637b61af0f43b5a89c1f0207af369193e3341a670ec9c143abd7d1a3b63530"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.11679",
    "kind": "arxiv",
    "version": 1
  }
}