Pith Number

pith:JD4XLPYW

pith:2016:JD4XLPYW2QS52WLGP4IUDV3E6Z

not attested not anchored not stored refs pending

On the crucial impact of the coupling projector-backprojector in iterative tomographic reconstruction

Federica Marone, Filippo Arcadu, Marco Stampanoni

arxiv:1612.05515 v1 · 2016-12-16 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JD4XLPYW2QS52WLGP4IUDV3E6Z}

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	2026-05-18T00:54:51.630433Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

48f975bf16d425dd59667f1141d764f64b108d17c813bb0d2c0f66221b40dbcd

Aliases

arxiv: 1612.05515 · arxiv_version: 1612.05515v1 · doi: 10.48550/arxiv.1612.05515 · pith_short_12: JD4XLPYW2QS5 · pith_short_16: JD4XLPYW2QS52WLG · pith_short_8: JD4XLPYW

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/JD4XLPYW2QS52WLGP4IUDV3E6Z \
  | 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: 48f975bf16d425dd59667f1141d764f64b108d17c813bb0d2c0f66221b40dbcd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2db122d5a08e6841ce45a7b4d4fb84adc34cc521368cec6e5ab48f9ab2be5503",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2016-12-16T15:48:11Z",
    "title_canon_sha256": "aa811c499e3b5ba08c65b5a3f2397c2b07b30a64c925e70ee6653ff617969f4a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.05515",
    "kind": "arxiv",
    "version": 1
  }
}