Pith Number

pith:22RWHUHD

pith:2023:22RWHUHDS2MJOSC576LQAHP3BW

1 verified not anchored not stored refs pending

Open-shell Tensor Hypercontraction

Devin A. Matthews, Megan Simons, Tingting Zhao

Open-shell LS-THC-MP2 and MP3 recover closed-shell accuracy for radicals and bond-breaking without extra spin corrections.

arxiv:2304.04040 v2 · 2023-04-08 · 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{22RWHUHDS2MJOSC576LQAHP3BW}

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

✓ Author claim 1 verified · sign in to claim

Megan Simons orcid verified

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.

Claims

C1strongest claim

Open-shell LS-THC-MP n methods exhibit errors highly comparable to those produced by closed-shell LS-THC-MP n, and are highly insensitive to particular chemical interactions, geometries, or even to moderate spin contamination.

C2weakest assumption

The assumption that diagrammatic spin summation and least-squares fitting of the amplitude tensor will preserve accuracy for open-shell cases without additional spin-specific corrections or re-optimization of THC factors.

C3one line summary

Open-shell LS-THC-MP2 and MP3 deliver scaling reductions with accuracy comparable to closed-shell versions and low sensitivity to geometry or spin contamination.

Receipt and verification

First computed	2026-05-17T23:39:21.712024Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d6a363d0e3969897485dff97001dfb0db990ae5de0f331b9d2fe20be024084f6

Aliases

arxiv: 2304.04040 · arxiv_version: 2304.04040v2 · doi: 10.48550/arxiv.2304.04040 · pith_short_12: 22RWHUHDS2MJ · pith_short_16: 22RWHUHDS2MJOSC5 · pith_short_8: 22RWHUHD

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/22RWHUHDS2MJOSC576LQAHP3BW \
  | 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: d6a363d0e3969897485dff97001dfb0db990ae5de0f331b9d2fe20be024084f6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5baecd38440c5b39f6b1b1c20ed172c86412a2791b6e66884de9d7e0da220fd7",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "physics.chem-ph",
    "submitted_at": "2023-04-08T15:16:49Z",
    "title_canon_sha256": "460a574dedbfc120ade9a724601140ebd0696653812bbc617b81a86364d89cb0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2304.04040",
    "kind": "arxiv",
    "version": 2
  }
}