Pith Number

pith:N7F7XMKX

pith:2016:N7F7XMKXLL3WAEDDVOFIPUYNGA

not attested not anchored not stored refs pending

A semi-analytical approach for the positive semidefinite Procrustes problem

Nicolas Gillis, Punit Sharma

arxiv:1612.01354 v2 · 2016-12-05 · math.OC · 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{N7F7XMKXLL3WAEDDVOFIPUYNGA}

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	2026-05-18T00:29:05.848802Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6fcbfbb1575af7601063ab8a87d30d3016b54329b7eb3a42ea6f55ecc8bb91b0

Aliases

arxiv: 1612.01354 · arxiv_version: 1612.01354v2 · doi: 10.48550/arxiv.1612.01354 · pith_short_12: N7F7XMKXLL3W · pith_short_16: N7F7XMKXLL3WAEDD · pith_short_8: N7F7XMKX

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/N7F7XMKXLL3WAEDDVOFIPUYNGA \
  | 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: 6fcbfbb1575af7601063ab8a87d30d3016b54329b7eb3a42ea6f55ecc8bb91b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f180cdc7ced284b5a25ad5c5070feecd974a5deb64e1c2cfa928f013158dd370",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2016-12-05T13:55:12Z",
    "title_canon_sha256": "f9d7ab1e99274a5f5869edc4f8f5cbac1b39b47cdda190cfffc165d7ae30625e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.01354",
    "kind": "arxiv",
    "version": 2
  }
}