Pith Number

pith:RR3QX5A3

pith:2026:RR3QX5A347UBJXHGJHD6TRZTPL

not attested not anchored not stored refs pending

No Free Lunch in Flow Surrogates under Time-Varying Boundary Conditions: A Two-Regime Study

Georg Winkler, Martin Stoll

arxiv:2607.23667 v1 · 2026-07-26 · math.NA · cs.LG · cs.NA · physics.flu-dyn

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RR3QX5A347UBJXHGJHD6TRZTPL}

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	2026-07-28T01:23:04.471669Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8c770bf41be7e814dce649c7e9c7337ad07e036b80489c157f6e8836806642c7

Aliases

arxiv: 2607.23667 · arxiv_version: 2607.23667v1 · doi: 10.48550/arxiv.2607.23667 · pith_short_12: RR3QX5A347UB · pith_short_16: RR3QX5A347UBJXHG · pith_short_8: RR3QX5A3

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/RR3QX5A347UBJXHGJHD6TRZTPL \
  | 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: 8c770bf41be7e814dce649c7e9c7337ad07e036b80489c157f6e8836806642c7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c74445fa7fe3701e5798a2a32f0dc59c05b369f38d397b22ae14b510f07d5e02",
    "cross_cats_sorted": [
      "cs.LG",
      "cs.NA",
      "physics.flu-dyn"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-07-26T14:02:46Z",
    "title_canon_sha256": "a38c2e63d32bc54139fd277e053560f681e7bcc163cf03d10b072f098ddfe172"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.23667",
    "kind": "arxiv",
    "version": 1
  }
}