Pith Number

pith:DIS4G7GD

pith:2014:DIS4G7GD5JT3AZ3ZCOJWYFM77N

not attested not anchored not stored refs pending

Extracting a basis with fixed block inside a matrix

Pierre Youssef

arxiv:1401.6434 v3 · 2014-01-24 · math.FA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DIS4G7GD5JT3AZ3ZCOJWYFM77N}

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	2026-05-18T01:27:05.783445Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1a25c37cc3ea67b0677913936c159ffb6f184b455ba6ea98a2dbe0519762c12f

Aliases

arxiv: 1401.6434 · arxiv_version: 1401.6434v3 · doi: 10.48550/arxiv.1401.6434 · pith_short_12: DIS4G7GD5JT3 · pith_short_16: DIS4G7GD5JT3AZ3Z · pith_short_8: DIS4G7GD

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/DIS4G7GD5JT3AZ3ZCOJWYFM77N \
  | 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: 1a25c37cc3ea67b0677913936c159ffb6f184b455ba6ea98a2dbe0519762c12f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d9ae6d3562413aa18adefec8934eb7b0231d7b72daa842f7f24a7dd8bcd66b61",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2014-01-24T19:46:22Z",
    "title_canon_sha256": "764048f78a8aa194cb633e0d724c84503678e66ec29c92b5a09ad9f2f3003929"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.6434",
    "kind": "arxiv",
    "version": 3
  }
}