Pith Number

pith:GPSCPMYU

pith:2009:GPSCPMYUNUSSKR4BKD5C5X3AYZ

not attested not anchored not stored refs pending

Exact-exchange kernel of time-dependent density functional theory: Frequency dependence and photoabsorption spectra of atoms

Maria Hellgren, Ulf von Barth

arxiv:0908.2900 v1 · 2009-08-20 · cond-mat.mes-hall · 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{GPSCPMYUNUSSKR4BKD5C5X3AYZ}

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	2026-05-18T02:12:24.806645Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

33e427b3146d2525478150fa2edf60c67f5059aea3fd897ea6968f958bf57f9f

Aliases

arxiv: 0908.2900 · arxiv_version: 0908.2900v1 · doi: 10.48550/arxiv.0908.2900 · pith_short_12: GPSCPMYUNUSS · pith_short_16: GPSCPMYUNUSSKR4B · pith_short_8: GPSCPMYU

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/GPSCPMYUNUSSKR4BKD5C5X3AYZ \
  | 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: 33e427b3146d2525478150fa2edf60c67f5059aea3fd897ea6968f958bf57f9f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "54ab0c8e294d08cc0730fd23627bc53dc81de4815ed938fe8bc82db23ae14c1b",
    "cross_cats_sorted": [
      "physics.chem-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mes-hall",
    "submitted_at": "2009-08-20T10:45:38Z",
    "title_canon_sha256": "9eb6e77300fe0589d7ecfdd9fa7e646c5d63c3c06d4707cce93ddf59caa21a56"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.2900",
    "kind": "arxiv",
    "version": 1
  }
}