Pith Number

pith:OCVIR4KM

pith:2009:OCVIR4KMWF6M72G7PGGS2HA76N

not attested not anchored not stored refs pending

Reverse Doppler Effect of Sound

Choon Mahn Park, Chul Koo Kim, Sam Hyeon Lee, Yong Mun Seo, Zhi Guo Wang

arxiv:0901.2772 v2 · 2009-01-19 · cond-mat.other · 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{OCVIR4KMWF6M72G7PGGS2HA76N}

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	2026-05-18T03:24:08.296456Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

70aa88f14cb17ccfe8df798d2d1c1ff37598fb8d68208445c9392e8982140a04

Aliases

arxiv: 0901.2772 · arxiv_version: 0901.2772v2 · doi: 10.48550/arxiv.0901.2772 · pith_short_12: OCVIR4KMWF6M · pith_short_16: OCVIR4KMWF6M72G7 · pith_short_8: OCVIR4KM

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/OCVIR4KMWF6M72G7PGGS2HA76N \
  | 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: 70aa88f14cb17ccfe8df798d2d1c1ff37598fb8d68208445c9392e8982140a04

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e71811c1013842bf222453dc1182c68ba134cc4d7d0dcbc96b24fd3ba10df897",
    "cross_cats_sorted": [
      "cond-mat.mtrl-sci"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.other",
    "submitted_at": "2009-01-19T07:04:11Z",
    "title_canon_sha256": "235a2a3b19d1d79ee1a9a3e58cb081f51280342ed5fa3774eaef8e0a3e64ba5a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.2772",
    "kind": "arxiv",
    "version": 2
  }
}