Pith Number

pith:52HT4B7W

pith:2017:52HT4B7W4ZVRC4S6T5B6UATMNA

not attested not anchored not stored refs pending

The Covering Path Problem on a Grid

Karen Smilowitz, Liwei Zeng, Sunil Chopra

arxiv:1709.07485 v2 · 2017-09-21 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{52HT4B7W4ZVRC4S6T5B6UATMNA}

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	2026-05-17T23:47:49.232567Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ee8f3e07f6e66b11725e9f43ea026c681349206ee7057415f6c15fe7d6ac122c

Aliases

arxiv: 1709.07485 · arxiv_version: 1709.07485v2 · doi: 10.48550/arxiv.1709.07485 · pith_short_12: 52HT4B7W4ZVR · pith_short_16: 52HT4B7W4ZVRC4S6 · pith_short_8: 52HT4B7W

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/52HT4B7W4ZVRC4S6T5B6UATMNA \
  | 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: ee8f3e07f6e66b11725e9f43ea026c681349206ee7057415f6c15fe7d6ac122c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ef4d463d1c9fec2e02b98c792410f941f013a6219a1bcb09ffbe35c1dba66cf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-09-21T18:40:02Z",
    "title_canon_sha256": "1c9081bbc2b5e1f4200bade761eed4275058f74f97a0f86e92745946b58446a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.07485",
    "kind": "arxiv",
    "version": 2
  }
}