Pith Number

pith:WDHMCJZ6

pith:2016:WDHMCJZ6KGBGRKKPPCYML54PO6

not attested not anchored not stored refs pending

Optimal regularized inverse matrices for inverse problems

Julianne Chung, Matthias Chung

arxiv:1603.05867 v1 · 2016-03-18 · 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{WDHMCJZ6KGBGRKKPPCYML54PO6}

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	2026-05-18T01:18:53.408885Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0cec1273e518268a94f78b0c5f78f778e0b9d298ba70364f1df7b6b321d9a30

Aliases

arxiv: 1603.05867 · arxiv_version: 1603.05867v1 · doi: 10.48550/arxiv.1603.05867 · pith_short_12: WDHMCJZ6KGBG · pith_short_16: WDHMCJZ6KGBGRKKP · pith_short_8: WDHMCJZ6

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/WDHMCJZ6KGBGRKKPPCYML54PO6 \
  | 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: b0cec1273e518268a94f78b0c5f78f778e0b9d298ba70364f1df7b6b321d9a30

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a68d6eeb47ed462a650307ecc08dc5b71f58781c70eb8498a63128b580ffb56",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2016-03-18T13:16:36Z",
    "title_canon_sha256": "ab4b956b09b6bbab2c838d456150637215dd90fff05eacbdb21cb8e9f8573301"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.05867",
    "kind": "arxiv",
    "version": 1
  }
}