Pith Number

pith:MF4PRBEB

pith:2013:MF4PRBEBGO2RTTBLQM6JY7HXJB

not attested not anchored not stored refs pending

Look-Ahead Removal for Top-Down Tree Transducers

Helmut Seidl, Joost Engelfriet, Sebastian Maneth

arxiv:1311.2400 v3 · 2013-11-11 · cs.FL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MF4PRBEBGO2RTTBLQM6JY7HXJB}

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	2026-05-18T01:25:24.819799Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6178f8848133b519cc2b833c9c7cf7486da8a3f8ad69cd9106ca250c09654920

Aliases

arxiv: 1311.2400 · arxiv_version: 1311.2400v3 · doi: 10.48550/arxiv.1311.2400 · pith_short_12: MF4PRBEBGO2R · pith_short_16: MF4PRBEBGO2RTTBL · pith_short_8: MF4PRBEB

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/MF4PRBEBGO2RTTBLQM6JY7HXJB \
  | 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: 6178f8848133b519cc2b833c9c7cf7486da8a3f8ad69cd9106ca250c09654920

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ab72c52e8a5e12eded554e062fc7260d35d8a71786e9e7e7f6af3942fce4d6fd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2013-11-11T10:07:56Z",
    "title_canon_sha256": "abeaaba6207bb2fbb97a9eacec24d5da20571e348710c2d5f08ece59f9eecdd1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.2400",
    "kind": "arxiv",
    "version": 3
  }
}