Pith Number

pith:WCVSWLVF

pith:2015:WCVSWLVFQ4ZUKG6MELMLJLSRO3

not attested not anchored not stored refs pending

Time-space tradeoffs for two-way finite automata

Daowen Qiu, Jozef Gruska, Shenggen Zheng

arxiv:1507.01346 v2 · 2015-07-06 · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WCVSWLVFQ4ZUKG6MELMLJLSRO3}

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	2026-05-18T01:18:52.593146Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0ab2b2ea58733451bcc22d8b4ae5176d07269fb21e48db8a97b6c8e46ba0b67

Aliases

arxiv: 1507.01346 · arxiv_version: 1507.01346v2 · doi: 10.48550/arxiv.1507.01346 · pith_short_12: WCVSWLVFQ4ZU · pith_short_16: WCVSWLVFQ4ZUKG6M · pith_short_8: WCVSWLVF

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/WCVSWLVFQ4ZUKG6MELMLJLSRO3 \
  | 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: b0ab2b2ea58733451bcc22d8b4ae5176d07269fb21e48db8a97b6c8e46ba0b67

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f1f11be2438f17d312777594594fa158dd88c3de10dce71e791c89bfbe22b450",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2015-07-06T08:07:00Z",
    "title_canon_sha256": "d6ec59cffb67d9e360124718f0a116b879d5be57543653ec15407980a26a007e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.01346",
    "kind": "arxiv",
    "version": 2
  }
}