Pith Number

pith:W6XCCZGP

pith:2011:W6XCCZGPAQHBLE7XJF2KHH3QME

not attested not anchored not stored refs pending

High resolution image reconstruction with constrained, total-variation minimization

Christer Ullberg, Emil Y. Sidky, Rick Chartrand, Xiaochuan Pan, Yuval Duchin

arxiv:1104.0909 v1 · 2011-04-05 · 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{W6XCCZGPAQHBLE7XJF2KHH3QME}

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	2026-05-18T00:58:43.491755Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b7ae2164cf040e1593f74974a39f706119a2a3cb7533db15fc783bec43f71624

Aliases

arxiv: 1104.0909 · arxiv_version: 1104.0909v1 · doi: 10.48550/arxiv.1104.0909 · pith_short_12: W6XCCZGPAQHB · pith_short_16: W6XCCZGPAQHBLE7X · pith_short_8: W6XCCZGP

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/W6XCCZGPAQHBLE7XJF2KHH3QME \
  | 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: b7ae2164cf040e1593f74974a39f706119a2a3cb7533db15fc783bec43f71624

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5dc4525e23a3c834bfe2566a059fed8eb98db88bafb6eb5bdf664c6b33a70f25",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.med-ph",
    "submitted_at": "2011-04-05T18:31:44Z",
    "title_canon_sha256": "21971bc3ee36981525df5c2d3bc1c3f76ea1dc44ecc2d29322b35db105931d3f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.0909",
    "kind": "arxiv",
    "version": 1
  }
}