Pith Number

pith:73UNVFBG

pith:2019:73UNVFBGZQSEEZUDTFHIJJZEIX

not attested not anchored not stored refs pending

Some Remarks on Real-Time Turing Machines

Holger Petersen

arxiv:1902.00975 v1 · 2019-02-03 · cs.CC

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{73UNVFBGZQSEEZUDTFHIJJZEIX}

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	2026-05-17T23:54:51.712507Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fee8da9426cc24426683994e84a72445c89759925529b0dfc1ff9e674f0736fe

Aliases

arxiv: 1902.00975 · arxiv_version: 1902.00975v1 · doi: 10.48550/arxiv.1902.00975 · pith_short_12: 73UNVFBGZQSE · pith_short_16: 73UNVFBGZQSEEZUD · pith_short_8: 73UNVFBG

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/73UNVFBGZQSEEZUDTFHIJJZEIX \
  | 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: fee8da9426cc24426683994e84a72445c89759925529b0dfc1ff9e674f0736fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6010dbf1cf24e732a116db6fb343cbe7441cdfaa6b515b50191cbee6b4055d06",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2019-02-03T22:06:20Z",
    "title_canon_sha256": "92f54cea8c8f9311a98810ca8efceeed29ea74eac4499c4bf4f27219e6c13477"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.00975",
    "kind": "arxiv",
    "version": 1
  }
}