Pith Number

pith:CPHLIEWJ

pith:2025:CPHLIEWJQ5GKRMUCBAILXWBC7M

not attested not anchored not stored refs pending

diffSPH: Differentiable Smoothed Particle Hydrodynamics for Adjoint Optimization and Machine Learning

Nils Thuerey, Rene Winchenbach

arxiv:2507.21684 v1 · 2025-07-29 · physics.flu-dyn · cs.AI · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CPHLIEWJQ5GKRMUCBAILXWBC7M}

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	2026-07-05T11:45:04.472261Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

13ceb412c9874ca8b2820810bbd822fb25f4573aebdd0f76ff3de1071b60cc5e

Aliases

arxiv: 2507.21684 · arxiv_version: 2507.21684v1 · doi: 10.48550/arxiv.2507.21684 · pith_short_12: CPHLIEWJQ5GK · pith_short_16: CPHLIEWJQ5GKRMUC · pith_short_8: CPHLIEWJ

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/CPHLIEWJQ5GKRMUCBAILXWBC7M \
  | 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: 13ceb412c9874ca8b2820810bbd822fb25f4573aebdd0f76ff3de1071b60cc5e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee95ed8f58192651a0072a8e71ae3e1bdb139e626dd6e30981baf81b0231c0e0",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2025-07-29T10:54:27Z",
    "title_canon_sha256": "6234b4ff11e842aca6d20c8aa107821c4c7d00bb5f44a7f5dfc8c319e970ae8c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.21684",
    "kind": "arxiv",
    "version": 1
  }
}