Pith Number

pith:7PCVGZUU

pith:2021:7PCVGZUUXNOBI6D4MLGH5V32DS

not attested not anchored not stored refs pending

Quantum ESPRESSO toward the exascale

Andrea Ferretti, Andrea Urru, Carlo Cavazzoni, Davide Brunato, Fabrizio Ferrari Ruffino, Iurii Timrov, Ivan Carnimeo, Nicola Marzari, Oscar Baseggio, Paolo Giannozzi, Pietro Bonf\`a, Pietro Delugas, Roberto Car, Stefano Baroni, Stefano de Gironcoli

arxiv:2104.10502 v2 · 2021-04-21 · physics.comp-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{7PCVGZUUXNOBI6D4MLGH5V32DS}

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	2026-07-05T02:34:13.449286Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fbc5536694bb5c14787c62cc7ed77a1c8f236e272e5feea647a25c34a12be652

Aliases

arxiv: 2104.10502 · arxiv_version: 2104.10502v2 · doi: 10.48550/arxiv.2104.10502 · pith_short_12: 7PCVGZUUXNOB · pith_short_16: 7PCVGZUUXNOBI6D4 · pith_short_8: 7PCVGZUU

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/7PCVGZUUXNOBI6D4MLGH5V32DS \
  | 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: fbc5536694bb5c14787c62cc7ed77a1c8f236e272e5feea647a25c34a12be652

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1b227e55a2acb02a711a108ac3b31a7157ea29f764201e586a4c150f918e2416",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.comp-ph",
    "submitted_at": "2021-04-21T12:43:15Z",
    "title_canon_sha256": "036130d2408c4af699d82450ce685625cb381d1b1a0a5f35eaa3ab3ae16bdb56"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.10502",
    "kind": "arxiv",
    "version": 2
  }
}