Pith Number

pith:6MQUDDOH

pith:2011:6MQUDDOHZMQS4C2RH52EMNW4OV

not attested not anchored not stored refs pending

Accelerated gradient methods for total-variation-based CT image reconstruction

Emil Y. Sidky, Jakob Heide J{\o}rgensen, Per Christian Hansen, S{\o}ren Holdt Jensen, Tobias Lindstr{\o}m Jensen, Xiaochuan Pan

arxiv:1105.4002 v1 · 2011-05-20 · math.NA · cs.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{6MQUDDOHZMQS4C2RH52EMNW4OV}

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	2026-05-18T04:21:50.204943Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f321418dc7cb212e0b513f744636dc754efe7ed5ae0147dddec7586f388d7113

Aliases

arxiv: 1105.4002 · arxiv_version: 1105.4002v1 · doi: 10.48550/arxiv.1105.4002 · pith_short_12: 6MQUDDOHZMQS · pith_short_16: 6MQUDDOHZMQS4C2R · pith_short_8: 6MQUDDOH

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/6MQUDDOHZMQS4C2RH52EMNW4OV \
  | 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: f321418dc7cb212e0b513f744636dc754efe7ed5ae0147dddec7586f388d7113

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9d9b1f78faa0d3d1e665a3c28437b552f964da033138ea644a5ef60ac8eb879d",
    "cross_cats_sorted": [
      "cs.NA",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2011-05-20T01:04:10Z",
    "title_canon_sha256": "074326e9c0de8e4bcb9a91286a18afc99adaee1942c54f85a90a3877243c0572"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.4002",
    "kind": "arxiv",
    "version": 1
  }
}