Pith Number

pith:42ROZZ3R

pith:2013:42ROZZ3R4TPEV7DLO2K2ZIQ3YT

not attested not anchored not stored refs pending

Exact and fixed-parameter algorithms for metro-line crossing minimization problems

Yoshio Okamoto, Yuichi Tatsu, Yushi Uno

arxiv:1306.3538 v1 · 2013-06-15 · 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{42ROZZ3R4TPEV7DLO2K2ZIQ3YT}

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	2026-05-18T03:20:47.279140Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e6a2ece771e4de4afc6b7695aca21bc4ed32bf03b55de1b67b3c45ccccf26dfc

Aliases

arxiv: 1306.3538 · arxiv_version: 1306.3538v1 · doi: 10.48550/arxiv.1306.3538 · pith_short_12: 42ROZZ3R4TPE · pith_short_16: 42ROZZ3R4TPEV7DL · pith_short_8: 42ROZZ3R

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/42ROZZ3R4TPEV7DLO2K2ZIQ3YT \
  | 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: e6a2ece771e4de4afc6b7695aca21bc4ed32bf03b55de1b67b3c45ccccf26dfc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f8ca4d7fbf9f7ed8473ce71cdc76e9c3c62381dce90c3ba194e85a301da6c27d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2013-06-15T01:41:52Z",
    "title_canon_sha256": "c25d35193ecdf90c37dad718008abf169a45b18b9da9bc4d7c5682d5231d0b90"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.3538",
    "kind": "arxiv",
    "version": 1
  }
}