Pith Number

pith:ZPT5UBOR

pith:2019:ZPT5UBORYTMIUJ3PIWJIGOUY5Y

not attested not anchored not stored refs pending

Reordering Derivatives of Trace Closures of Regular Languages (Full Version)

Hendrik Maarand, Tarmo Uustalu

arxiv:1908.03551 v1 · 2019-08-09 · 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{ZPT5UBORYTMIUJ3PIWJIGOUY5Y}

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	2026-07-04T23:52:40.857000Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cbe7da05d1c4d88a276f4592833a98ee3f112e2661efb27e5b591c1a4ec4f73a

Aliases

arxiv: 1908.03551 · arxiv_version: 1908.03551v1 · doi: 10.48550/arxiv.1908.03551 · pith_short_12: ZPT5UBORYTMI · pith_short_16: ZPT5UBORYTMIUJ3P · pith_short_8: ZPT5UBOR

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/ZPT5UBORYTMIUJ3PIWJIGOUY5Y \
  | 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: cbe7da05d1c4d88a276f4592833a98ee3f112e2661efb27e5b591c1a4ec4f73a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9167dac938b4a77edbeb5b9194a9d49972837064c22a220e9cb95445a162ae3b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2019-08-09T17:45:14Z",
    "title_canon_sha256": "4ab4a6ae7cfd87ed7d1c6f03f3cef22aff732468089dbd5d8e33045dafe4d0ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.03551",
    "kind": "arxiv",
    "version": 1
  }
}