Pith Number

pith:6MTJCD2C

pith:2015:6MTJCD2CSYVHIYB2NE4EO5C27Q

not attested not anchored not stored refs pending

Solution sets for equations over free groups are EDT0L languages -- ICALP 2015 version

Laura Ciobanu, Murray Elder, Volker Diekert

arxiv:1502.03426 v3 · 2015-02-11 · cs.LO · cs.DM · cs.FL · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6MTJCD2CSYVHIYB2NE4EO5C27Q}

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	2026-05-18T01:35:38.199383Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f326910f42962a74603a693847745afc3f6eb2001abbeab088c2f8997353d836

Aliases

arxiv: 1502.03426 · arxiv_version: 1502.03426v3 · doi: 10.48550/arxiv.1502.03426 · pith_short_12: 6MTJCD2CSYVH · pith_short_16: 6MTJCD2CSYVHIYB2 · pith_short_8: 6MTJCD2C

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/6MTJCD2CSYVHIYB2NE4EO5C27Q \
  | 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: f326910f42962a74603a693847745afc3f6eb2001abbeab088c2f8997353d836

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "30490c4c2e93eed765522431df7644ad77369dd821b84a0d9133e278b1c430f1",
    "cross_cats_sorted": [
      "cs.DM",
      "cs.FL",
      "math.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2015-02-11T20:23:41Z",
    "title_canon_sha256": "270b193e9d8f1932a5cc6e0605c1181ff3dfa8561e156eb2eefe032330b9540a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.03426",
    "kind": "arxiv",
    "version": 3
  }
}