Pith Number

pith:7JR7QECU

pith:2024:7JR7QECUAWEHCE2C3WLUQYQSOT

not attested not anchored not stored refs pending

Reconfiguration of unit squares and disks: PSPACE-hardness in simple settings

Andr\'e Schulz, Jack Stade, Kevin Buchin, Lena Schlipf, Linda Kleist, Maarten L\"offler, Maike Buchin, Mikkel Abrahamsen

arxiv:2412.21017 v1 · 2024-12-30 · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7JR7QECUAWEHCE2C3WLUQYQSOT}

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	2026-07-05T09:55:26.216389Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa63f810540588711342dd9748621274f3eb88d0c88fa8aaf21314cb72756055

Aliases

arxiv: 2412.21017 · arxiv_version: 2412.21017v1 · doi: 10.48550/arxiv.2412.21017 · pith_short_12: 7JR7QECUAWEH · pith_short_16: 7JR7QECUAWEHCE2C · pith_short_8: 7JR7QECU

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/7JR7QECUAWEHCE2C3WLUQYQSOT \
  | 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: fa63f810540588711342dd9748621274f3eb88d0c88fa8aaf21314cb72756055

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "504fd906a6823f98665f11043f8951d0bb65cd219f52cbb61de78a5f2140f446",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2024-12-30T15:34:25Z",
    "title_canon_sha256": "8b69235808f4b8d63e1bac5031a7354ec6247aac12fdbdbc1031993427a101c5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2412.21017",
    "kind": "arxiv",
    "version": 1
  }
}