Pith Number

pith:QEFPLOYP

pith:2025:QEFPLOYPOGBUDC66G3CBHOR6NW

not attested not anchored not stored refs pending

On the Reachability Problem for Two-Dimensional Branching VASS

Clotilde Bizi\`ere, Gr\'egoire Sutre, J\'er\^ome Leroux, Thibault Hilaire

arxiv:2506.22561 v1 · 2025-06-27 · 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{QEFPLOYPOGBUDC66G3CBHOR6NW}

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	2026-07-05T11:28:40.490486Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

810af5bb0f7183418bde36c413ba3e6db72a670d46d0f5aaaa6cd4543efe87aa

Aliases

arxiv: 2506.22561 · arxiv_version: 2506.22561v1 · doi: 10.48550/arxiv.2506.22561 · pith_short_12: QEFPLOYPOGBU · pith_short_16: QEFPLOYPOGBUDC66 · pith_short_8: QEFPLOYP

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/QEFPLOYPOGBUDC66G3CBHOR6NW \
  | 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: 810af5bb0f7183418bde36c413ba3e6db72a670d46d0f5aaaa6cd4543efe87aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e55ca3891152498ad465bf0fd08854eeee06f9b7676dd8a0b9d286c791299fef",
    "cross_cats_sorted": [
      "cs.FL"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2025-06-27T18:20:20Z",
    "title_canon_sha256": "fdba439993c0364c475eab15a0e9e4cfe50dbdd6d1ff4073c7e192b6a6f8e2ac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2506.22561",
    "kind": "arxiv",
    "version": 1
  }
}