Pith Number

pith:SAX2Z32X

pith:2018:SAX2Z32XCN2UG2HTV6ZHUE6QZ7

not attested not anchored not stored refs pending

Randomized Core Reduction for Discrete Ill-Posed Problem

Liping Zhang, Yimin Wei

arxiv:1808.02654 v1 · 2018-08-08 · 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{SAX2Z32XCN2UG2HTV6ZHUE6QZ7}

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	2026-05-18T00:08:34.741448Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

902facef5713754368f3afb27a13d0cffe13fa538682a87632dc7bb7f9c8a32f

Aliases

arxiv: 1808.02654 · arxiv_version: 1808.02654v1 · doi: 10.48550/arxiv.1808.02654 · pith_short_12: SAX2Z32XCN2U · pith_short_16: SAX2Z32XCN2UG2HT · pith_short_8: SAX2Z32X

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/SAX2Z32XCN2UG2HTV6ZHUE6QZ7 \
  | 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: 902facef5713754368f3afb27a13d0cffe13fa538682a87632dc7bb7f9c8a32f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "727779dc5ec1e8b8c139bf7ffde20ecb39e2e02b3eec0638b87c348f9cd236ed",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-08-08T08:12:09Z",
    "title_canon_sha256": "f34b1e7a61042312884ba33ed1f7e5e7a5085beb5643cf443d5341b1d03a9a32"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.02654",
    "kind": "arxiv",
    "version": 1
  }
}