Pith Number

pith:QL7KWG7E

pith:2010:QL7KWG7EM6LJT2X7BBQFKXGFST

not attested not anchored not stored refs pending

A constrained, total-variation minimization algorithm for low-intensity X-ray CT

Christer Ullberg, Emil Y. Sidky, Xiaochuan Pan, Yuval Duchin

arxiv:1011.4630 v1 · 2010-11-21 · physics.med-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{QL7KWG7EM6LJT2X7BBQFKXGFST}

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	2026-05-18T02:04:42.943458Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

82feab1be4679699eaff0860555cc594d842416efba80e397124d5dcd678b968

Aliases

arxiv: 1011.4630 · arxiv_version: 1011.4630v1 · doi: 10.48550/arxiv.1011.4630 · pith_short_12: QL7KWG7EM6LJ · pith_short_16: QL7KWG7EM6LJT2X7 · pith_short_8: QL7KWG7E

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/QL7KWG7EM6LJT2X7BBQFKXGFST \
  | 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: 82feab1be4679699eaff0860555cc594d842416efba80e397124d5dcd678b968

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e90acca7a525041850098ddb53551db4944dca05cf59ce2641f534dd4c960ca3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.med-ph",
    "submitted_at": "2010-11-21T01:56:36Z",
    "title_canon_sha256": "88119dec8092b175f8fedfedebdc78c2d53c04c2fe205280626179612de35368"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.4630",
    "kind": "arxiv",
    "version": 1
  }
}