Pith Number

pith:TFQS6MCF

pith:2024:TFQS6MCFD4ZUOOIM6CP2MR2SQL

not attested not anchored not stored refs pending

Construction of local reduced spaces for Friedrichs' systems via randomized training

Christian Engwer, Lukas Renelt, Mario Ohlberger

arxiv:2404.18839 v1 · 2024-04-29 · 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{TFQS6MCFD4ZUOOIM6CP2MR2SQL}

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	2026-07-05T08:13:21.431439Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

99612f30451f3347390cf09fa6475282f2beca570c2f2e6e0ebd553b81daf620

Aliases

arxiv: 2404.18839 · arxiv_version: 2404.18839v1 · doi: 10.48550/arxiv.2404.18839 · pith_short_12: TFQS6MCFD4ZU · pith_short_16: TFQS6MCFD4ZUOOIM · pith_short_8: TFQS6MCF

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/TFQS6MCFD4ZUOOIM6CP2MR2SQL \
  | 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: 99612f30451f3347390cf09fa6475282f2beca570c2f2e6e0ebd553b81daf620

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "381ab4e12928b2049f3517170496ab028a6f8f78def0790dc999daaec216dff9",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2024-04-29T16:27:29Z",
    "title_canon_sha256": "5fa6519ace05aac99156575f15d694594d3a022d976574726a16119ee8669818"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2404.18839",
    "kind": "arxiv",
    "version": 1
  }
}