Pith Number

pith:GPH7VURF

pith:2011:GPH7VURFBIB27MWZT5HHWEDJWP

not attested not anchored not stored refs pending

Convex optimization problem prototyping for image reconstruction in computed tomography with the Chambolle-Pock algorithm

Emil Y. Sidky, Jakob H. J{\o}rgensen, Xiaochuan Pan

arxiv:1111.5632 v2 · 2011-11-23 · math.NA · math.OC · 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{GPH7VURFBIB27MWZT5HHWEDJWP}

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	2026-05-18T01:59:26.048109Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

33cffad2250a03afb2d99f4e7b1069b3e44258dba8ad5268d852b1b1953650d7

Aliases

arxiv: 1111.5632 · arxiv_version: 1111.5632v2 · doi: 10.48550/arxiv.1111.5632 · pith_short_12: GPH7VURFBIB2 · pith_short_16: GPH7VURFBIB27MWZ · pith_short_8: GPH7VURF

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/GPH7VURFBIB27MWZT5HHWEDJWP \
  | 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: 33cffad2250a03afb2d99f4e7b1069b3e44258dba8ad5268d852b1b1953650d7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "357c85e0e9f2d277d376a3a739db60ceff6bb602005d174ec4f697a32f96352f",
    "cross_cats_sorted": [
      "math.OC",
      "physics.med-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2011-11-23T21:38:14Z",
    "title_canon_sha256": "fe63b7c691cfb3873b1d245a22634f210c1691fdee442b3d070bb8f5a7bb2c34"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.5632",
    "kind": "arxiv",
    "version": 2
  }
}