Pith Number

pith:Y4BCKUBD

pith:2023:Y4BCKUBDLVEMTMBL7ZFX5K2B5T

not attested not anchored not stored refs pending

A directional regularization method for the limited-angle Helsinki Tomography Challenge using the Core Imaging Library (CIL)

Edoardo Pasca, Evangelos Papoutsellis, Gemma Fardell, Jakob Sauer J{\o}rgensen, Laura Murgatroyd

arxiv:2310.01671 v1 · 2023-10-02 · physics.med-ph · cs.MS · cs.NA · 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{Y4BCKUBDLVEMTMBL7ZFX5K2B5T}

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	2026-07-05T06:56:44.594541Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c7022550235d48c9b02bfe4b7eab41ecca7ee070b0cebe8936873c2e9f19d7c3

Aliases

arxiv: 2310.01671 · arxiv_version: 2310.01671v1 · doi: 10.48550/arxiv.2310.01671 · pith_short_12: Y4BCKUBDLVEM · pith_short_16: Y4BCKUBDLVEMTMBL · pith_short_8: Y4BCKUBD

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/Y4BCKUBDLVEMTMBL7ZFX5K2B5T \
  | 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: c7022550235d48c9b02bfe4b7eab41ecca7ee070b0cebe8936873c2e9f19d7c3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "34e6c60c49a66b37b36b8f2550e19603c011b89ae77fd495b80f9bac8092d5a0",
    "cross_cats_sorted": [
      "cs.MS",
      "cs.NA",
      "math.NA",
      "math.OC"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.med-ph",
    "submitted_at": "2023-10-02T22:02:29Z",
    "title_canon_sha256": "89f2128e21bbae8d3743f2ecc7070d7fe34aa17f66bb85c417325a05d2ef929c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2310.01671",
    "kind": "arxiv",
    "version": 1
  }
}