Pith Number

pith:NR25P7CF

pith:2019:NR25P7CF7YQNGL3552YCBSKEPC

not attested not anchored not stored refs pending

On Topologically Controlled Model Reduction for Discrete-Time Systems

Fredy Vides

arxiv:1905.03910 v3 · 2019-05-10 · math.OA · cs.NA · math.DS · 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{NR25P7CF7YQNGL3552YCBSKEPC}

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	2026-05-17T23:43:32.641620Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c75d7fc45fe20d32f7deeb020c944789303747a2e10e84312139c0729442da4

Aliases

arxiv: 1905.03910 · arxiv_version: 1905.03910v3 · doi: 10.48550/arxiv.1905.03910 · pith_short_12: NR25P7CF7YQN · pith_short_16: NR25P7CF7YQNGL35 · pith_short_8: NR25P7CF

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/NR25P7CF7YQNGL3552YCBSKEPC \
  | 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: 6c75d7fc45fe20d32f7deeb020c944789303747a2e10e84312139c0729442da4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "39bbd6fd14b92b77875a402b937493c2634de51e23a59db79e529e3033f74035",
    "cross_cats_sorted": [
      "cs.NA",
      "math.DS",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OA",
    "submitted_at": "2019-05-10T01:57:40Z",
    "title_canon_sha256": "198ac60e1e9a75fb98c0ad44e84189394af96b9dd932e0f3fa1307f5b0fd5eac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.03910",
    "kind": "arxiv",
    "version": 3
  }
}