Pith Number

pith:W6EHQIOR

pith:2013:W6EHQIORL3GFPQUVGURWEOM37Q

not attested not anchored not stored refs pending

General constraint preconditioning iteration method for singular saddle-point problems

Ai-Li Yang, Guo-Feng Zhang, Yu-Jiang Wu

arxiv:1312.7072 v1 · 2013-12-26 · 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{W6EHQIORL3GFPQUVGURWEOM37Q}

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	2026-05-18T03:03:45.967664Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b7887821d15ecc57c295352362399bfc3add0a94e5bc04914092f006e7f93b3d

Aliases

arxiv: 1312.7072 · arxiv_version: 1312.7072v1 · doi: 10.48550/arxiv.1312.7072 · pith_short_12: W6EHQIORL3GF · pith_short_16: W6EHQIORL3GFPQUV · pith_short_8: W6EHQIOR

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/W6EHQIORL3GFPQUVGURWEOM37Q \
  | 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: b7887821d15ecc57c295352362399bfc3add0a94e5bc04914092f006e7f93b3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ecb8add7e65ce7b29b5ac7da8ac923e9ea5e3424aa1707215647bd354333a660",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2013-12-26T09:06:29Z",
    "title_canon_sha256": "676f4b83e028723e28677f448e2ef5cb17304c726428e13266d9c5bb2543d510"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.7072",
    "kind": "arxiv",
    "version": 1
  }
}