Pith Number

pith:R6JXXDKL

pith:2014:R6JXXDKLRYJXMDFUJO6YVMBWDO

not attested not anchored not stored refs pending

The Emptiness Problem for Tree Automata with at Least One Disequality Constraint is NP-hard

FEMTO-ST), INRIA Nancy - Grand Est / LORIA / LIFC), LIFL), O. Kouchnarenko (FEMTO-ST, P.-C H\'eam (INRIA Nancy - Grand Est / LORIA / LIFC, V. Hugot (INRIA Lille - Nord Europe

arxiv:1412.0839 v1 · 2014-12-02 · 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{R6JXXDKLRYJXMDFUJO6YVMBWDO}

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	2026-05-18T02:32:21.066465Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f937b8d4b8e13760cb44bbd8ab0361b9e84038c0e6e1b203ab42f84e0fb8e9c

Aliases

arxiv: 1412.0839 · arxiv_version: 1412.0839v1 · doi: 10.48550/arxiv.1412.0839 · pith_short_12: R6JXXDKLRYJX · pith_short_16: R6JXXDKLRYJXMDFU · pith_short_8: R6JXXDKL

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/R6JXXDKLRYJXMDFUJO6YVMBWDO \
  | 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: 8f937b8d4b8e13760cb44bbd8ab0361b9e84038c0e6e1b203ab42f84e0fb8e9c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "116cb2202298f87b6e06a1e637442bbe558bffe573f571cd19dcd246af945f4d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2014-12-02T10:12:40Z",
    "title_canon_sha256": "70aea4c6d9559619dfc8946905b1eb71ae7c98227feff17df2116673b0ed2e94"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.0839",
    "kind": "arxiv",
    "version": 1
  }
}