Pith Number

pith:QUBYQRGB

pith:2021:QUBYQRGBWB4CYYTN6GDZ24AOQR

not attested not anchored not stored refs pending

MP2 Is Not Good Enough: Transfer Learning ML Models for Accurate VPT2 Frequencies

Basel, Eric Boittier, Markus Meuwly (Department of Chemistry, Meenu Upadhyay, Silvan K\"aser, Switzerland), University of Basel

arxiv:2103.05491 v2 · 2021-03-09 · 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{QUBYQRGBWB4CYYTN6GDZ24AOQR}

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	2026-07-05T02:22:26.239627Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85038844c1b0782c626df1879d700e847780718ab7c2ff9fb4543f404fb5b069

Aliases

arxiv: 2103.05491 · arxiv_version: 2103.05491v2 · doi: 10.48550/arxiv.2103.05491 · pith_short_12: QUBYQRGBWB4C · pith_short_16: QUBYQRGBWB4CYYTN · pith_short_8: QUBYQRGB

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/QUBYQRGBWB4CYYTN6GDZ24AOQR \
  | 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: 85038844c1b0782c626df1879d700e847780718ab7c2ff9fb4543f404fb5b069

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42b11a66497d58bba63757ba2798578ca6ec6598e60d9fcf8b946c6ccaf262ba",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.chem-ph",
    "submitted_at": "2021-03-09T15:24:47Z",
    "title_canon_sha256": "cfa77fe3b1d16ce362e5473fe43e6d1d092e7e24dd8e1c95fdc14678c91ff11a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.05491",
    "kind": "arxiv",
    "version": 2
  }
}