Pith Number

pith:QN7GQNX2

pith:2019:QN7GQNX2VXCFR2JGPVIZ6FMIXR

not attested not anchored not stored refs pending

Two Single-Reference Approaches to Singlet Biradicaloid Problems: Complex, Restricted Orbitals and Approximate Spin-Projection Combined With Regularized Orbital-Optimized M{\o}ller-Plesset Perturbation Theory

Joonho Lee, Martin Head-Gordon

arxiv:1903.11225 v2 · 2019-03-27 · 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{QN7GQNX2VXCFR2JGPVIZ6FMIXR}

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	2026-05-17T23:42:08.188496Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

837e6836faadc458e9267d519f1588bc56be2b6764fdca42c15b9a75c548b46f

Aliases

arxiv: 1903.11225 · arxiv_version: 1903.11225v2 · doi: 10.48550/arxiv.1903.11225 · pith_short_12: QN7GQNX2VXCF · pith_short_16: QN7GQNX2VXCFR2JG · pith_short_8: QN7GQNX2

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/QN7GQNX2VXCFR2JGPVIZ6FMIXR \
  | 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: 837e6836faadc458e9267d519f1588bc56be2b6764fdca42c15b9a75c548b46f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "402f3a71d984f9fe51bd3c8e909be9b17916e7c1c08e3c7e0a37dc990561456b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.chem-ph",
    "submitted_at": "2019-03-27T02:15:40Z",
    "title_canon_sha256": "d01a61bd78d4394f2dff7b98e3b211228e6ce641983e271b7f276873b1b31ff0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.11225",
    "kind": "arxiv",
    "version": 2
  }
}