Pith Number

pith:7OI3ZFSX

pith:2017:7OI3ZFSXFLRWW2RY56RY7HPP4Q

not attested not anchored not stored refs pending

Analysis of Krylov Subspace Approximation to Large Scale Differential Riccati Equations

Antti Koskela, Hermann Mena

arxiv:1705.07507 v4 · 2017-05-21 · 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{7OI3ZFSXFLRWW2RY56RY7HPP4Q}

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	2026-06-04T18:10:51.291458Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fb91bc96572ae36b6a38efa38f9defe43467774fb858090bcb0f861eb64cde50

Aliases

arxiv: 1705.07507 · arxiv_version: 1705.07507v4 · doi: 10.48550/arxiv.1705.07507 · pith_short_12: 7OI3ZFSXFLRW · pith_short_16: 7OI3ZFSXFLRWW2RY · pith_short_8: 7OI3ZFSX

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/7OI3ZFSXFLRWW2RY56RY7HPP4Q \
  | 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: fb91bc96572ae36b6a38efa38f9defe43467774fb858090bcb0f861eb64cde50

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3e7311ca146f90e3731056f3cb7fa8125f7dd750ca55f60e0c036e36e44099b5",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-05-21T20:36:37Z",
    "title_canon_sha256": "f7421ea4c922aa8fbdce44af8b8f349a76d96de1d1bd4cc19589dcb337e601cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.07507",
    "kind": "arxiv",
    "version": 4
  }
}