Pith Number

pith:VUTFVQMY

pith:2018:VUTFVQMY2XYCKAM6OR4WF7D7RH

not attested not anchored not stored refs pending

Model reduction for linear systems with low-rank switching

Benjamin Unger, Philipp Schulze

arxiv:1801.09445 v1 · 2018-01-29 · cs.SY · 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{VUTFVQMY2XYCKAM6OR4WF7D7RH}

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	2026-05-17T23:57:50.815424Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ad265ac198d5f025019e747962fc7f89e53371cb9d7e75708ecda221324d2a26

Aliases

arxiv: 1801.09445 · arxiv_version: 1801.09445v1 · doi: 10.48550/arxiv.1801.09445 · pith_short_12: VUTFVQMY2XYC · pith_short_16: VUTFVQMY2XYCKAM6 · pith_short_8: VUTFVQMY

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/VUTFVQMY2XYCKAM6OR4WF7D7RH \
  | 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: ad265ac198d5f025019e747962fc7f89e53371cb9d7e75708ecda221324d2a26

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c162330ceea73a2986c02f273301300b556b3dc41838b91883d4e483ed9bad5e",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SY",
    "submitted_at": "2018-01-29T11:06:13Z",
    "title_canon_sha256": "a967c0cf29c4ff7ccd9d6656ef68bc8495f8c9fb0d5d93eb867c3f7c19e232d8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.09445",
    "kind": "arxiv",
    "version": 1
  }
}