Pith Number

pith:A3RPYH4X

pith:2010:A3RPYH4XX3ZTRTICYR3WSBGKDM

not attested not anchored not stored refs pending

Least-Squares on the Real Symplectic Group

Simone Fiori

arxiv:1001.0829 v2 · 2010-01-06 · 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{A3RPYH4XX3ZTRTICYR3WSBGKDM}

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	2026-05-18T03:31:42.004635Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

06e2fc1f97bef338cd02c4776904ca1b0e1bc6c57a66e1778b58c6cd9e9c56cd

Aliases

arxiv: 1001.0829 · arxiv_version: 1001.0829v2 · doi: 10.48550/arxiv.1001.0829 · pith_short_12: A3RPYH4XX3ZT · pith_short_16: A3RPYH4XX3ZTRTIC · pith_short_8: A3RPYH4X

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/A3RPYH4XX3ZTRTICYR3WSBGKDM \
  | 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: 06e2fc1f97bef338cd02c4776904ca1b0e1bc6c57a66e1778b58c6cd9e9c56cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b40dc546975eb6f73bce1b0345ba0b93b25df60381d1ca0a3a3823c701387c31",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2010-01-06T07:32:37Z",
    "title_canon_sha256": "d8c8b6cd8acf52d0c0f113c90a4de8c62533d89140c49795cf6db3354c3bb0b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1001.0829",
    "kind": "arxiv",
    "version": 2
  }
}