Pith Number

pith:DHBIPKFP

pith:2009:DHBIPKFPRUAOACEMP2NT7VWCZ2

not attested not anchored not stored refs pending

Sound speed in water-saturated glass beads as a function of frequency and porosity

Charles Radin, Harry L. Swinney, Matthew D. Guild, Matthias Schr\"oter, Preston S. Wilson, Theodore F.Argo IV

arxiv:0906.4798 v2 · 2009-06-25 · cond-mat.soft · cond-mat.mtrl-sci

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DHBIPKFPRUAOACEMP2NT7VWCZ2}

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	2026-05-18T01:27:15.573471Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

19c287a8af8d00e0088c7e9b3fd6c2ce8ac4db67c68d3b27650cf8b8a49b6bc3

Aliases

arxiv: 0906.4798 · arxiv_version: 0906.4798v2 · doi: 10.48550/arxiv.0906.4798 · pith_short_12: DHBIPKFPRUAO · pith_short_16: DHBIPKFPRUAOACEM · pith_short_8: DHBIPKFP

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/DHBIPKFPRUAOACEMP2NT7VWCZ2 \
  | 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: 19c287a8af8d00e0088c7e9b3fd6c2ce8ac4db67c68d3b27650cf8b8a49b6bc3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2fe68abfe7a3acce86025e958069be9bf0df27ce38da4562ad74ab29cdc7fb9b",
    "cross_cats_sorted": [
      "cond-mat.mtrl-sci"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "cond-mat.soft",
    "submitted_at": "2009-06-25T21:00:05Z",
    "title_canon_sha256": "b2bb1cd2131ce175d90296dd1116d8a1124b30c6d192324b1897dd4f652efd97"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.4798",
    "kind": "arxiv",
    "version": 2
  }
}