Pith Number

pith:SMVKJYVQ

pith:2014:SMVKJYVQEFMQFNPPK63NUJRTAD

not attested not anchored not stored refs pending

String-Averaging Expectation-Maximization for Maximum Likelihood Estimation in Emission Tomography

\'A. R. De Pierro, E. S. Helou, H. H.-S. Lu, I-L. Chern, M. Jiang, T.-B. Chen, Y. Censor

arxiv:1402.2455 v1 · 2014-02-11 · physics.med-ph · cs.CY · 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{SMVKJYVQEFMQFNPPK63NUJRTAD}

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	2026-05-17T23:49:44.636868Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

932aa4e2b0215902b5ef57b6da263300f43d5205f0522955718b79a5d4405b13

Aliases

arxiv: 1402.2455 · arxiv_version: 1402.2455v1 · doi: 10.48550/arxiv.1402.2455 · pith_short_12: SMVKJYVQEFMQ · pith_short_16: SMVKJYVQEFMQFNPP · pith_short_8: SMVKJYVQ

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/SMVKJYVQEFMQFNPPK63NUJRTAD \
  | 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: 932aa4e2b0215902b5ef57b6da263300f43d5205f0522955718b79a5d4405b13

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9aa829390ba1edf9051dcfaca371055db766c7d54f672e580c129f8449651d59",
    "cross_cats_sorted": [
      "cs.CY",
      "math.NA",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.med-ph",
    "submitted_at": "2014-02-11T11:26:34Z",
    "title_canon_sha256": "989d0a97b7441c01ffabff116645dde6a9b6540cbce270cf980e1dde9da5f95a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.2455",
    "kind": "arxiv",
    "version": 1
  }
}