Pith Number

pith:2W3R32WP

pith:2014:2W3R32WPYK43DTLSMMPLGHEDPF

not attested not anchored not stored refs pending

How little data is enough? Phase-diagram analysis of sparsity-regularized X-ray CT

Emil Y. Sidky, Jakob S. J{\o}rgensen

arxiv:1412.6833 v1 · 2014-12-21 · math.OC · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2W3R32WPYK43DTLSMMPLGHEDPF}

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	2026-05-18T01:35:11.574934Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5b71deacfc2b9b1cd72631eb31c8379732b8e0cef18f7a103431429792a7aee

Aliases

arxiv: 1412.6833 · arxiv_version: 1412.6833v1 · doi: 10.48550/arxiv.1412.6833 · pith_short_12: 2W3R32WPYK43 · pith_short_16: 2W3R32WPYK43DTLS · pith_short_8: 2W3R32WP

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/2W3R32WPYK43DTLSMMPLGHEDPF \
  | 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: d5b71deacfc2b9b1cd72631eb31c8379732b8e0cef18f7a103431429792a7aee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "84d1ae6a6c83d23c6e8d10c81dbc21c5f805f5c0129e802edba98ada6c59ad4c",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2014-12-21T20:41:43Z",
    "title_canon_sha256": "eb5b26b965e41be236797af95e13a2a1d99dcfdc7148897a3190118a5afacf7e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.6833",
    "kind": "arxiv",
    "version": 1
  }
}