Pith Number

pith:JU4YVB64

pith:2021:JU4YVB647Y42LKLHCT4UMPFWPM

not attested not anchored not stored refs pending

Techniques for second order convergent weakly-compressible smoothed particle hydrodynamics schemes without boundaries

Pawan Negi, Prabhu Ramachandran

arxiv:2107.11859 v4 · 2021-07-25 · math.NA · cs.NA · physics.comp-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{JU4YVB647Y42LKLHCT4UMPFWPM}

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	2026-07-05T04:54:45.996982Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4d398a87dcfe39a5a96714f9463cb67b3d137ae57382de0f7447e7978e51ed3b

Aliases

arxiv: 2107.11859 · arxiv_version: 2107.11859v4 · doi: 10.48550/arxiv.2107.11859 · pith_short_12: JU4YVB647Y42 · pith_short_16: JU4YVB647Y42LKLH · pith_short_8: JU4YVB64

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/JU4YVB647Y42LKLHCT4UMPFWPM \
  | 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: 4d398a87dcfe39a5a96714f9463cb67b3d137ae57382de0f7447e7978e51ed3b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f20c746f2b51fbbedb9e66182769e3f76d45eec4ae3ffbf9bd6149db517194f3",
    "cross_cats_sorted": [
      "cs.NA",
      "physics.comp-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2021-07-25T17:46:23Z",
    "title_canon_sha256": "8ab461f43fe2b2a87a8d35c776f803894d57c4c7097524d14bc3562732dde2dc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2107.11859",
    "kind": "arxiv",
    "version": 4
  }
}