Pith Number

pith:NWXX7A4Y

pith:2018:NWXX7A4Y2JPOAUK4Y46AYDLFWD

not attested not anchored not stored refs pending

The Satisfiability of Extended Word Equations: The Boundary Between Decidability and Undecidability

Dirk Nowotka, Florin Manea, Joel Day, Paul He, Vijay Ganesh

arxiv:1802.00523 v1 · 2018-02-02 · cs.LO · 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{NWXX7A4Y2JPOAUK4Y46AYDLFWD}

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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	2026-05-18T00:24:32.964855Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6daf7f8398d25ee0515cc73c0c0d65b0f852cd5c68f1ab9f9748ad104801d2dd

Aliases

arxiv: 1802.00523 · arxiv_version: 1802.00523v1 · doi: 10.48550/arxiv.1802.00523 · pith_short_12: NWXX7A4Y2JPO · pith_short_16: NWXX7A4Y2JPOAUK4 · pith_short_8: NWXX7A4Y

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/NWXX7A4Y2JPOAUK4Y46AYDLFWD \
  | 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: 6daf7f8398d25ee0515cc73c0c0d65b0f852cd5c68f1ab9f9748ad104801d2dd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9ecec8754ef9ac070161910cf8a89e02ae91e01bbc3c6ca365a59358ecfae08f",
    "cross_cats_sorted": [
      "cs.FL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2018-02-02T00:46:36Z",
    "title_canon_sha256": "9da627c146b56672a3e64300cab3f6f1b06b50b06b041c0438cf727b7b9da904"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.00523",
    "kind": "arxiv",
    "version": 1
  }
}