Pith Number

pith:OQ5SQPY7

pith:2019:OQ5SQPY7QAVCVKOWZG3L4JMHGJ

not attested not anchored not stored refs pending

On Solving Reachability in Grid Digraphs using a Psuedoseparator

Raghunath Tewari, Rahul Jain

arxiv:1902.00488 v3 · 2019-02-01 · cs.CC · 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{OQ5SQPY7QAVCVKOWZG3L4JMHGJ}

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	2026-07-05T09:55:49.683376Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

743b283f1f802a2aa9d6c9b6be2587324ac9e55b0b03951b6048441b7de7c940

Aliases

arxiv: 1902.00488 · arxiv_version: 1902.00488v3 · doi: 10.48550/arxiv.1902.00488 · pith_short_12: OQ5SQPY7QAVC · pith_short_16: OQ5SQPY7QAVCVKOW · pith_short_8: OQ5SQPY7

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/OQ5SQPY7QAVCVKOWZG3L4JMHGJ \
  | 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: 743b283f1f802a2aa9d6c9b6be2587324ac9e55b0b03951b6048441b7de7c940

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eae512d665cf78d88c2db9f9f5a1077c91fdd2de6cc7fdca7e8293378b2574de",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2019-02-01T18:22:11Z",
    "title_canon_sha256": "cef6294a3b30f0759a98a1adf9277df6098b5fd99694c3a32493d31ccbfc57ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.00488",
    "kind": "arxiv",
    "version": 3
  }
}