Pith Number

pith:VIWBIXPJ

pith:2017:VIWBIXPJZFBQUQ4F4S2QQVNYRC

not attested not anchored not stored refs pending

Steepest descent algorithm on orthogonal Stiefel manifolds

Dan Comanescu, Ioan Casu, Petre Birtea

arxiv:1709.06295 v1 · 2017-09-19 · 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{VIWBIXPJZFBQUQ4F4S2QQVNYRC}

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	2026-05-18T00:07:18.422684Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aa2c145de9c9430a4385e4b50855b888a1bbb7a7d58688e0eda2bc135a3dff6c

Aliases

arxiv: 1709.06295 · arxiv_version: 1709.06295v1 · doi: 10.48550/arxiv.1709.06295 · pith_short_12: VIWBIXPJZFBQ · pith_short_16: VIWBIXPJZFBQUQ4F · pith_short_8: VIWBIXPJ

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/VIWBIXPJZFBQUQ4F4S2QQVNYRC \
  | 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: aa2c145de9c9430a4385e4b50855b888a1bbb7a7d58688e0eda2bc135a3dff6c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5577581037b5ceddf4548b14de28a480c05747055953787139a73939f6eef64c",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-09-19T08:43:59Z",
    "title_canon_sha256": "c4ae3ff60d5adb370de72ada3904d838b58ddbcb6b01e6dfb4c581106e12d419"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.06295",
    "kind": "arxiv",
    "version": 1
  }
}