Pith Number

pith:UPQBXWX4

pith:2012:UPQBXWX4VVD5MMGWGCCEZ5TBBN

not attested not anchored not stored refs pending

Fast matrix decomposition in F2

Anna Rimoldi, Enrico Bertolazzi

arxiv:1209.5198 v2 · 2012-09-24 · 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{UPQBXWX4VVD5MMGWGCCEZ5TBBN}

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	2026-05-18T00:31:29.238585Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3e01bdafcad47d630d630844cf6610b4fc48b815b705c1275466bb19818f61a

Aliases

arxiv: 1209.5198 · arxiv_version: 1209.5198v2 · doi: 10.48550/arxiv.1209.5198 · pith_short_12: UPQBXWX4VVD5 · pith_short_16: UPQBXWX4VVD5MMGW · pith_short_8: UPQBXWX4

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/UPQBXWX4VVD5MMGWGCCEZ5TBBN \
  | 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: a3e01bdafcad47d630d630844cf6610b4fc48b815b705c1275466bb19818f61a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f3f9fcd551c2b8a686eefacdf2909229b12f469c82eaeb609c1421dbb65ee2b5",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2012-09-24T08:58:34Z",
    "title_canon_sha256": "386cbe40cd06a4419ad277c6e67d35c36a07e375581debd8472a2866d01a5bca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.5198",
    "kind": "arxiv",
    "version": 2
  }
}