Pith Number

pith:7CP7NZ2D

pith:2009:7CP7NZ2DEJZ524JMGNX6EJIKCG

not attested not anchored not stored refs pending

Time-dependent density-functional approach for exciton binding energies

C. A. Ullrich, V. Turkowski

arxiv:0903.0027 v1 · 2009-02-28 · cond-mat.mtrl-sci · cond-mat.other

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7CP7NZ2DEJZ524JMGNX6EJIKCG}

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	2026-05-18T02:14:38.134514Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f89ff6e7432273dd712c336fe2250a11900e3f899f37f715003a5974ceae820c

Aliases

arxiv: 0903.0027 · arxiv_version: 0903.0027v1 · doi: 10.48550/arxiv.0903.0027 · pith_short_12: 7CP7NZ2DEJZ5 · pith_short_16: 7CP7NZ2DEJZ524JM · pith_short_8: 7CP7NZ2D

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/7CP7NZ2DEJZ524JMGNX6EJIKCG \
  | 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: f89ff6e7432273dd712c336fe2250a11900e3f899f37f715003a5974ceae820c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "63df823b6d03fabf51a5520dbb3d6a1a34c2d836b28559292eb07073353eb68d",
    "cross_cats_sorted": [
      "cond-mat.other"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2009-02-28T00:26:45Z",
    "title_canon_sha256": "5a061e0a0b09465fdce5dcad1743bd64e4a3edb5bcb8310c512735016ccaebed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.0027",
    "kind": "arxiv",
    "version": 1
  }
}