Pith Number

pith:CD6Y7DZN

pith:2020:CD6Y7DZNRGZLM2UW7PE63XK2QD

not attested not anchored not stored refs pending

Solving Decomposable Sparse Systems

Frank Sottile, Jose Israel Rodriguez, Taylor Brysiewicz, Thomas Yahl

arxiv:2001.04228 v2 · 2020-01-13 · math.AG · cs.NA · 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{CD6Y7DZNRGZLM2UW7PE63XK2QD}

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	2026-07-05T01:55:07.917071Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

10fd8f8f2d89b2b66a96fbc9eddd5a80f35375f06a11a9a182e21cd0b740adbe

Aliases

arxiv: 2001.04228 · arxiv_version: 2001.04228v2 · doi: 10.48550/arxiv.2001.04228 · pith_short_12: CD6Y7DZNRGZL · pith_short_16: CD6Y7DZNRGZLM2UW · pith_short_8: CD6Y7DZN

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/CD6Y7DZNRGZLM2UW7PE63XK2QD \
  | 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: 10fd8f8f2d89b2b66a96fbc9eddd5a80f35375f06a11a9a182e21cd0b740adbe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b4669d2590e8ae368a71c75e6258af53b2497fbce3baf1fe622770fa8fbd1ce9",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2020-01-13T13:22:33Z",
    "title_canon_sha256": "7f21e32a261a3b575410c6d5230edce63e7f32db342281b4a2f990966395d46b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2001.04228",
    "kind": "arxiv",
    "version": 2
  }
}