Pith Number

pith:UIMDYDH6

pith:1994:UIMDYDH6PMCGDDP4VLEYU7M4FB

not attested not anchored not stored refs pending

Variable Smoothing Lengths and Energy Conservation in Smoothed Particle Hydrodynamics

John C.B. Papaloizou, Richard P. Nelson

arxiv:astro-ph/9406053 v1 · 1994-06-17 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UIMDYDH6PMCGDDP4VLEYU7M4FB}

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	2026-05-18T01:40:24.527765Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a2183c0cfe7b04618dfcaac98a7d9c2850c4586c66aba467c4eb41da00eb5fff

Aliases

arxiv: astro-ph/9406053 · arxiv_version: astro-ph/9406053v1 · doi: 10.48550/arxiv.astro-ph/9406053 · pith_short_12: UIMDYDH6PMCG · pith_short_16: UIMDYDH6PMCGDDP4 · pith_short_8: UIMDYDH6

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/UIMDYDH6PMCGDDP4VLEYU7M4FB \
  | 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: a2183c0cfe7b04618dfcaac98a7d9c2850c4586c66aba467c4eb41da00eb5fff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d87719c2f5ccb67318f86dcd9d0a5f0825b3e3b460b7463ffe06e990116390ab",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1994-06-17T15:56:26Z",
    "title_canon_sha256": "40c531385fd4b23a552a64603149312be1ecf26193173ff145d29c33bb510773"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9406053",
    "kind": "arxiv",
    "version": 1
  }
}