Pith Number

pith:UP7NYTNY

pith:2011:UP7NYTNYYD4XRT4QN5C4W5RHID

not attested not anchored not stored refs pending

Evaluation of New Density Functional with Account of van der Waals Forces by Use of Experimental H2 Physisorption Data on Cu(111)

Andr\'e K Kelkkanen, Bengt I Lundqvist, David C Langreth, Elsebeth Schr\"oder, Kristian Berland, Kyuho Lee, Per Hyldgaard, Stig Andersson

arxiv:1109.0726 v1 · 2011-09-04 · cond-mat.mtrl-sci

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UP7NYTNYYD4XRT4QN5C4W5RHID}

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	2026-05-18T02:00:40.168293Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3fedc4db8c0f978cf906f45cb762740edbf91fa2a9cb4651837ec5a03202503

Aliases

arxiv: 1109.0726 · arxiv_version: 1109.0726v1 · doi: 10.48550/arxiv.1109.0726 · pith_short_12: UP7NYTNYYD4X · pith_short_16: UP7NYTNYYD4XRT4Q · pith_short_8: UP7NYTNY

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/UP7NYTNYYD4XRT4QN5C4W5RHID \
  | 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: a3fedc4db8c0f978cf906f45cb762740edbf91fa2a9cb4651837ec5a03202503

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bcbe5a35cc38512925e497ee1e5399e0e413d855acc16c5ade8cdf1dca636796",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2011-09-04T16:49:04Z",
    "title_canon_sha256": "8b3599437c334e0d343054a7754c8065de68a77a68622541e70711bb9fde47e9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.0726",
    "kind": "arxiv",
    "version": 1
  }
}