Pith Number

pith:BQRQFXWT

pith:2015:BQRQFXWT3XWDZLWNQAHEWOH4KE

not attested not anchored not stored refs pending

Kato expansion in quantum canonical perturbation theory

A. S. Nikolaev

arxiv:1504.05113 v2 · 2015-04-20 · quant-ph · math-ph · math.MP · 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{BQRQFXWT3XWDZLWNQAHEWOH4KE}

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	2026-05-18T01:10:45.991358Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0c2302ded3ddec3caecd800e4b38fc5112ddb0b7fb2d298bfb06e24d226479ea

Aliases

arxiv: 1504.05113 · arxiv_version: 1504.05113v2 · doi: 10.48550/arxiv.1504.05113 · pith_short_12: BQRQFXWT3XWD · pith_short_16: BQRQFXWT3XWDZLWN · pith_short_8: BQRQFXWT

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/BQRQFXWT3XWDZLWNQAHEWOH4KE \
  | 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: 0c2302ded3ddec3caecd800e4b38fc5112ddb0b7fb2d298bfb06e24d226479ea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "95f3fa8976357212801be5dca1ae54abd3728e72405189b472e4b41c0cb23cbd",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP",
      "physics.chem-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2015-04-20T16:39:45Z",
    "title_canon_sha256": "c36b2b77d866e8149eed6d5696ad27a40022c0d611ffa0caf3a62efce9ae94dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.05113",
    "kind": "arxiv",
    "version": 2
  }
}