Pith Number

pith:PACNHGRF

pith:2015:PACNHGRFUFALH52U4V3TSL7Z7D

not attested not anchored not stored refs pending

Tree compression using string grammars

Danny Hucke, Eric Noeth, Markus Lohrey, Moses Ganardi

arxiv:1504.05535 v2 · 2015-04-21 · cs.FL · 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{PACNHGRFUFALH52U4V3TSL7Z7D}

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	2026-05-18T01:32:00.617625Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7804d39a25a140b3f754e577392ff9f8dc9e066f2b526e8357b1e05e9e8fc429

Aliases

arxiv: 1504.05535 · arxiv_version: 1504.05535v2 · doi: 10.48550/arxiv.1504.05535 · pith_short_12: PACNHGRFUFAL · pith_short_16: PACNHGRFUFALH52U · pith_short_8: PACNHGRF

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/PACNHGRFUFALH52U4V3TSL7Z7D \
  | 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: 7804d39a25a140b3f754e577392ff9f8dc9e066f2b526e8357b1e05e9e8fc429

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8dbb2ebf05b576369d6db5a824ff125bbfa7e0f0ebed604e98d93bf09df4d1f9",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2015-04-21T18:25:29Z",
    "title_canon_sha256": "d84362ff8ac4adc163ff90c5a1963f3a6219d932cd6af8c83d938cfe5995c3f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.05535",
    "kind": "arxiv",
    "version": 2
  }
}