Pith Number

pith:4UWHUEGQ

pith:2009:4UWHUEGQ4OT4B2YTHWJDDJ4WRZ

not attested not anchored not stored refs pending

Variational collocation for systems of coupled anharmonic oscillators

Francisco M. Fernandez, Paolo Amore

arxiv:0905.1038 v1 · 2009-05-07 · quant-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{4UWHUEGQ4OT4B2YTHWJDDJ4WRZ}

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	2026-05-18T02:13:46.670222Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e52c7a10d0e3a7c0eb133d9231a7968e59dcb2d7d2f5d6884f0ba5406519c734

Aliases

arxiv: 0905.1038 · arxiv_version: 0905.1038v1 · doi: 10.48550/arxiv.0905.1038 · pith_short_12: 4UWHUEGQ4OT4 · pith_short_16: 4UWHUEGQ4OT4B2YT · pith_short_8: 4UWHUEGQ

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/4UWHUEGQ4OT4B2YTHWJDDJ4WRZ \
  | 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: e52c7a10d0e3a7c0eb133d9231a7968e59dcb2d7d2f5d6884f0ba5406519c734

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b9102d856e79f33eab44471a3416ff34986c532a835379f1a21bd0755586f1c1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-05-07T14:39:19Z",
    "title_canon_sha256": "6222865819217e391b30cdc98c12c88c9b5d4c5229daaf48919dcd23001cc6c3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.1038",
    "kind": "arxiv",
    "version": 1
  }
}