Pith Number

pith:XYQNHHWQ

pith:2009:XYQNHHWQ3NGKZLAE6YF2YABAKI

not attested not anchored not stored refs pending

Highly efficient sparse-matrix inversion techniques and average procedures applied to collisional-radiative codes

F. de Gaufridy de Dortan, M. Poirier

arxiv:0902.2895 v1 · 2009-02-17 · physics.plasm-ph · 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{XYQNHHWQ3NGKZLAE6YF2YABAKI}

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	2026-05-18T02:14:47.367287Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be20d39ed0db4cacac04f60bac002052180fcbbb682d0c874c3ee31530a3c628

Aliases

arxiv: 0902.2895 · arxiv_version: 0902.2895v1 · doi: 10.48550/arxiv.0902.2895 · pith_short_12: XYQNHHWQ3NGK · pith_short_16: XYQNHHWQ3NGKZLAE · pith_short_8: XYQNHHWQ

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/XYQNHHWQ3NGKZLAE6YF2YABAKI \
  | 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: be20d39ed0db4cacac04f60bac002052180fcbbb682d0c874c3ee31530a3c628

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dba5c955e0473e3f091d0485e7c91132701f0fb6f0e14a0965477871e24664ef",
    "cross_cats_sorted": [
      "physics.atom-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.plasm-ph",
    "submitted_at": "2009-02-17T11:35:58Z",
    "title_canon_sha256": "705217b6afc06787c111c6f1aeeaa78889614322254ff61b0941ca6d75495edd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.2895",
    "kind": "arxiv",
    "version": 1
  }
}