Pith Number

pith:SE6HZLTH

pith:2004:SE6HZLTHKK7TBDB4JIEYSNOEJX

not attested not anchored not stored refs pending

Reconstruction Algorithms for Positron Emission Tomography and Single Photon Emission Computed Tomography and their Numerical Implementation

A. Iserles, A.S. Fokas, V. Marinakis

arxiv:physics/0412030 v1 · 2004-12-04 · physics.med-ph · cs.NA · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SE6HZLTHKK7TBDB4JIEYSNOEJX}

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	2026-06-03T22:06:22.796513Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

913c7cae6752bf308c3c4a098935c44dee4cc6a320c56a3e94562aca1407123b

Aliases

arxiv: physics/0412030 · arxiv_version: physics/0412030v1 · doi: 10.48550/arxiv.physics/0412030 · pith_short_12: SE6HZLTHKK7T · pith_short_16: SE6HZLTHKK7TBDB4 · pith_short_8: SE6HZLTH

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/SE6HZLTHKK7TBDB4JIEYSNOEJX \
  | 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: 913c7cae6752bf308c3c4a098935c44dee4cc6a320c56a3e94562aca1407123b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8acb52aaddf1ec63a5ecfa210fe7b45e23480a2ed2c592a538d65b02e2ae6b51",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "",
    "primary_cat": "physics.med-ph",
    "submitted_at": "2004-12-04T14:26:05Z",
    "title_canon_sha256": "887f3b03a4f8c40cbbfa29ef2d95414a3676c00b8cca2a3896ecba323af05a65"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0412030",
    "kind": "arxiv",
    "version": 1
  }
}