Pith Number

pith:BFAYAQUE

pith:2017:BFAYAQUETCHI63YTZIES5RIILP

not attested not anchored not stored refs pending

Accelerating optimization-based computed tomography via sparse matrix approximations

Richard C. Barnard, Rick Archibald

arxiv:1705.07497 v1 · 2017-05-21 · 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{BFAYAQUETCHI63YTZIES5RIILP}

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	2026-05-18T00:44:05.388728Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0941804284988e8f6f13ca092ec5085bc14f0382f776367b4f2aae9dd42737c5

Aliases

arxiv: 1705.07497 · arxiv_version: 1705.07497v1 · doi: 10.48550/arxiv.1705.07497 · pith_short_12: BFAYAQUETCHI · pith_short_16: BFAYAQUETCHI63YT · pith_short_8: BFAYAQUE

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/BFAYAQUETCHI63YTZIES5RIILP \
  | 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: 0941804284988e8f6f13ca092ec5085bc14f0382f776367b4f2aae9dd42737c5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a0deec020be33324a32bef1d25f22c0f7ec769c32415d8340e0a69aee49855f1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-05-21T19:40:54Z",
    "title_canon_sha256": "e4bb156252868eea150343d55a510961e6d18415389c91e7d76ae3d652a4d2eb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.07497",
    "kind": "arxiv",
    "version": 1
  }
}