Pith Number

pith:355PU4FX

pith:2018:355PU4FXN2U5LMZZVCOTL2XTEW

not attested not anchored not stored refs pending

An Improved Method of Total Variation Superiorization Applied to Reconstruction in Proton Computed Tomography

Blake Schultze, Keith E. Schubert, Paniz Karbasi, Reinhard W. Schulte, Yair Censor

arxiv:1803.01112 v3 · 2018-03-03 · physics.med-ph · cs.CY · 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{355PU4FXN2U5LMZZVCOTL2XTEW}

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	2026-05-17T23:56:10.279425Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

df7afa70b76ea9d5b339a89d35eaf325892b4237c8cca06ee34e396d201d7e85

Aliases

arxiv: 1803.01112 · arxiv_version: 1803.01112v3 · doi: 10.48550/arxiv.1803.01112 · pith_short_12: 355PU4FXN2U5 · pith_short_16: 355PU4FXN2U5LMZZ · pith_short_8: 355PU4FX

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/355PU4FXN2U5LMZZVCOTL2XTEW \
  | 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: df7afa70b76ea9d5b339a89d35eaf325892b4237c8cca06ee34e396d201d7e85

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8246082b854d1ae981bcf69aa2a0903fab41dba1dd150b6f030f6901fd2c48a1",
    "cross_cats_sorted": [
      "cs.CY",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.med-ph",
    "submitted_at": "2018-03-03T06:06:47Z",
    "title_canon_sha256": "6dd7be4cacc6d24dd00b33665934afaa67153f0a80743138c6442d584bc9874e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.01112",
    "kind": "arxiv",
    "version": 3
  }
}