Pith Number

pith:VGDKUEU7

pith:2015:VGDKUEU7V7PENXZQ2YYAAXN3KY

not attested not anchored not stored refs pending

van der Waals coefficients for positronium interactions with atoms

A. R. Swann, G. F. Gribakin, J. A. Ludlow

arxiv:1504.05334 v2 · 2015-04-21 · physics.atom-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{VGDKUEU7V7PENXZQ2YYAAXN3KY}

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	2026-05-18T01:37:13.297991Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a986aa129fafde46df30d630005dbb560594e96ad906e04b7844c14e17317cc7

Aliases

arxiv: 1504.05334 · arxiv_version: 1504.05334v2 · doi: 10.48550/arxiv.1504.05334 · pith_short_12: VGDKUEU7V7PE · pith_short_16: VGDKUEU7V7PENXZQ · pith_short_8: VGDKUEU7

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/VGDKUEU7V7PENXZQ2YYAAXN3KY \
  | 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: a986aa129fafde46df30d630005dbb560594e96ad906e04b7844c14e17317cc7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "65bdff327e5607fcb7af4ef5b1a85088fdfb4e6a6107fe1824d199c2a0d52295",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2015-04-21T08:29:18Z",
    "title_canon_sha256": "8ae4305a9f1ce25d425851aef8aad106cc23c332430607c0670941d4de0c5c42"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.05334",
    "kind": "arxiv",
    "version": 2
  }
}