Pith Number

pith:GVBTNUKD

pith:2016:GVBTNUKD4LXQ576DCO3N4ZRVTP

not attested not anchored not stored refs pending

Reachability in Two-Dimensional Unary Vector Addition Systems with States is NL-Complete

Matthias Englert, Patrick Totzke, Ranko Lazi\'c

arxiv:1602.00477 v2 · 2016-02-01 · cs.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GVBTNUKD4LXQ576DCO3N4ZRVTP}

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	2026-05-18T01:15:32.063784Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

354336d143e2ef0effc313b6de66359bd7dab49e81e209d115c584bd64587fc8

Aliases

arxiv: 1602.00477 · arxiv_version: 1602.00477v2 · doi: 10.48550/arxiv.1602.00477 · pith_short_12: GVBTNUKD4LXQ · pith_short_16: GVBTNUKD4LXQ576D · pith_short_8: GVBTNUKD

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/GVBTNUKD4LXQ576DCO3N4ZRVTP \
  | 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: 354336d143e2ef0effc313b6de66359bd7dab49e81e209d115c584bd64587fc8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d30957a5da92f731140436d6ce7764bb513f90040829e9b00650ada7bd8e4048",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2016-02-01T11:19:29Z",
    "title_canon_sha256": "be82b0a5e6a20eb6be3d24551ab3dbd242455fd6a48e82df0421cade6c18dae2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.00477",
    "kind": "arxiv",
    "version": 2
  }
}