Pith Number

pith:ZZCY3FKD

pith:2019:ZZCY3FKDLLNIMM5KEGLN7EQHZ4

not attested not anchored not stored refs pending

On the Golub--Kahan bidiagonalization for ill-posed tensor equations with applications to color image restoration

Fatemeh P. A. Beik, Khalide Jbilou, Lothar Reichel, Mehdi Najafi-Kalyani

arxiv:1907.08811 v1 · 2019-07-20 · 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{ZZCY3FKDLLNIMM5KEGLN7EQHZ4}

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	2026-05-17T23:40:05.299228Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ce458d95435ada8633aa2196df9207cf074b1dccf056d3dac63104859e989326

Aliases

arxiv: 1907.08811 · arxiv_version: 1907.08811v1 · doi: 10.48550/arxiv.1907.08811 · pith_short_12: ZZCY3FKDLLNI · pith_short_16: ZZCY3FKDLLNIMM5K · pith_short_8: ZZCY3FKD

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/ZZCY3FKDLLNIMM5KEGLN7EQHZ4 \
  | 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: ce458d95435ada8633aa2196df9207cf074b1dccf056d3dac63104859e989326

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "28adaf07fee0c4d03856288ff5a33f847d58671956292272549d4e972b6bef2d",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-07-20T13:36:56Z",
    "title_canon_sha256": "0906addc16b3f33077950c8c9e418e05dd1bd3f7221d6385229826d5db034787"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.08811",
    "kind": "arxiv",
    "version": 1
  }
}