Pith Number

pith:6MIASE2D

pith:2018:6MIASE2DPW7LHVBCORBKTWDZBL

not attested not anchored not stored refs pending

Superiorization of Preconditioned Conjugate Gradient Algorithms for Tomographic Image Reconstruction

Chuan Lin, Elias S. Helou, Gabor T. Herman, Marcelo V. W. Zibetti

arxiv:1807.10151 v1 · 2018-07-26 · math.NA · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6MIASE2DPW7LHVBCORBKTWDZBL}

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	2026-05-18T00:09:45.248305Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f3100913437dbeb3d4227442a9d8790af8e0d269d411b9ca4f0a01e7a0efc7c8

Aliases

arxiv: 1807.10151 · arxiv_version: 1807.10151v1 · doi: 10.48550/arxiv.1807.10151 · pith_short_12: 6MIASE2DPW7L · pith_short_16: 6MIASE2DPW7LHVBC · pith_short_8: 6MIASE2D

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/6MIASE2DPW7LHVBCORBKTWDZBL \
  | 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: f3100913437dbeb3d4227442a9d8790af8e0d269d411b9ca4f0a01e7a0efc7c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e2f82bb66038a34020b3656f1e390e79720e0ac0639e5abcc99269d0ca6c1c43",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-07-26T14:04:27Z",
    "title_canon_sha256": "25093883a8800d85d4dbd59ec9035435cbfb3a607c0efba0d47c031f24563142"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.10151",
    "kind": "arxiv",
    "version": 1
  }
}