Pith Number

pith:OLW5KWAV

pith:2021:OLW5KWAVZTWHZL5FQXQUSUCGGR

not attested not anchored not stored refs pending

Estimating Mean Speed-of-Sound from Sequence-Dependent Geometric Disparities

Lin Zhang, Orcun Goksel, Xenia Augustin

arxiv:2109.11819 v1 · 2021-09-24 · eess.IV · physics.med-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{OLW5KWAVZTWHZL5FQXQUSUCGGR}

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	2026-07-05T03:17:07.819584Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

72edd55815ccec7cafa585e14950463450661fb21013bf4fdad834a7324bb784

Aliases

arxiv: 2109.11819 · arxiv_version: 2109.11819v1 · doi: 10.48550/arxiv.2109.11819 · pith_short_12: OLW5KWAVZTWH · pith_short_16: OLW5KWAVZTWHZL5F · pith_short_8: OLW5KWAV

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/OLW5KWAVZTWHZL5FQXQUSUCGGR \
  | 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: 72edd55815ccec7cafa585e14950463450661fb21013bf4fdad834a7324bb784

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e829be8516aa2810adfca3278680c6875e68238a70b2387e19e2a8dbead0f96d",
    "cross_cats_sorted": [
      "physics.med-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.IV",
    "submitted_at": "2021-09-24T09:05:04Z",
    "title_canon_sha256": "62ce899ac25a082aa5474e9281569c692682670a39cc61688eef73df6818f7f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.11819",
    "kind": "arxiv",
    "version": 1
  }
}