Pith Number

pith:HZ2WEQKC

pith:2025:HZ2WEQKCRFRX5DXDTKCCWUS76Q

not attested not anchored not stored refs pending

Efficient and reliable modeling of large $\pi$-electron systems with the Pariser--Parr--Pople Hamiltonian and pCCD-based methods

Katharina Boguslawski, Pawe{\l} Tecmer, Somayeh Ahmadkhani, Zahra Karimi

arxiv:2508.18963 v2 · 2025-08-26 · physics.chem-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{HZ2WEQKCRFRX5DXDTKCCWUS76Q}

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	2026-06-26T01:15:45.572020Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3e7562414289637e8ee39a842b525ff43cbd40e0c4ac138f1f1a6a72db0f6e57

Aliases

arxiv: 2508.18963 · arxiv_version: 2508.18963v2 · doi: 10.48550/arxiv.2508.18963 · pith_short_12: HZ2WEQKCRFRX · pith_short_16: HZ2WEQKCRFRX5DXD · pith_short_8: HZ2WEQKC

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/HZ2WEQKCRFRX5DXDTKCCWUS76Q \
  | 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: 3e7562414289637e8ee39a842b525ff43cbd40e0c4ac138f1f1a6a72db0f6e57

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4a7ae3417ba73b75c5680fb576ef41d3966350f2a15ed18b4f9dc5cb543d26c4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.chem-ph",
    "submitted_at": "2025-08-26T12:06:44Z",
    "title_canon_sha256": "1d0a409f7b177e6cab4032d30e3636267cc5a095a1bb554cc8766ff380ecaec9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.18963",
    "kind": "arxiv",
    "version": 2
  }
}