Pith Number

pith:4FUHLK5Y

pith:2019:4FUHLK5YRR3P55BCH7OOTF5A6A

not attested not anchored not stored refs pending

Insertion Operations on Deterministic Reversal-Bounded Counter Machines

Ian McQuillan, Joey Eremondi, Oscar H. Ibarra

arxiv:1903.03518 v1 · 2019-03-08 · 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{4FUHLK5YRR3P55BCH7OOTF5A6A}

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	2026-05-17T23:51:45.271911Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e16875abb88c76fef4223fdce997a0f009e004b5a1435cf1dea26be78fdd14ae

Aliases

arxiv: 1903.03518 · arxiv_version: 1903.03518v1 · doi: 10.48550/arxiv.1903.03518 · pith_short_12: 4FUHLK5YRR3P · pith_short_16: 4FUHLK5YRR3P55BC · pith_short_8: 4FUHLK5Y

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/4FUHLK5YRR3P55BCH7OOTF5A6A \
  | 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: e16875abb88c76fef4223fdce997a0f009e004b5a1435cf1dea26be78fdd14ae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "257b1173d1bdcf1adc01dea8a2e054df13236cf3e44465d20e46505fa1a49fde",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2019-03-08T15:46:04Z",
    "title_canon_sha256": "33c38bd4561bbf090a929881ba4c9b101147a33f4eb5575a8af5db8a442b1a57"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.03518",
    "kind": "arxiv",
    "version": 1
  }
}