Pith Number

pith:O4JTZDWD

pith:2015:O4JTZDWD3DRNDOB736VFIS4E4Z

not attested not anchored not stored refs pending

Some Results on the Regularization of LSQR for Large-Scale Discrete Ill-Posed Problems

Yi Huang, Zhongxiao Jia

arxiv:1503.01864 v3 · 2015-03-06 · math.NA · cs.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{O4JTZDWD3DRNDOB736VFIS4E4Z}

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	2026-06-04T17:09:04.834396Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

77133c8ec3d8e2d1b83fdfaa544b84e6424720e0e01201b6e311e22e036a5a27

Aliases

arxiv: 1503.01864 · arxiv_version: 1503.01864v3 · doi: 10.48550/arxiv.1503.01864 · pith_short_12: O4JTZDWD3DRN · pith_short_16: O4JTZDWD3DRNDOB7 · pith_short_8: O4JTZDWD

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/O4JTZDWD3DRNDOB736VFIS4E4Z \
  | 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: 77133c8ec3d8e2d1b83fdfaa544b84e6424720e0e01201b6e311e22e036a5a27

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "011ec7474311542e6924c2faec55d94e4e0cfdbdd7aaa60268295c4135a0e45a",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-03-06T06:57:35Z",
    "title_canon_sha256": "aa53db1abadea30c503c7a5d1ca0b34793f75289a37ca053ae7febd75938f3db"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.01864",
    "kind": "arxiv",
    "version": 3
  }
}