Pith Number

pith:L4H6B5MR

pith:2017:L4H6B5MRLPMEO3PXRNXAH6NI5T

not attested not anchored not stored refs pending

Weakly and Strongly Irreversible Regular Languages

Giovanna J. Lavado (Dipartimento di Informatica, Giovanni Pighizzini (Dipartimento di Informatica, Luca Prigioniero (Dipartimento di Informatica, Universit\`a degli Studi di Milano)

arxiv:1708.06465 v1 · 2017-08-22 · 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{L4H6B5MRLPMEO3PXRNXAH6NI5T}

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	2026-05-18T00:37:41.405634Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5f0fe0f5915bd8476df78b6e03f9a8ecfd542b5839ee858c2ff5621182737737

Aliases

arxiv: 1708.06465 · arxiv_version: 1708.06465v1 · doi: 10.48550/arxiv.1708.06465 · pith_short_12: L4H6B5MRLPME · pith_short_16: L4H6B5MRLPMEO3PX · pith_short_8: L4H6B5MR

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/L4H6B5MRLPMEO3PXRNXAH6NI5T \
  | 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: 5f0fe0f5915bd8476df78b6e03f9a8ecfd542b5839ee858c2ff5621182737737

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8d1fb5d377bca04def2c490644d0f99e236771f512ad0c12a0ec6be2ceafccdf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2017-08-22T00:50:39Z",
    "title_canon_sha256": "5ae580a56d0406975fda68b660cea5553509bd696f1c9d2407f078f092240921"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.06465",
    "kind": "arxiv",
    "version": 1
  }
}