Pith Number

pith:O7ZU6IYX

pith:2007:O7ZU6IYX2XQSP5DBYCUOWCD2XR

not attested not anchored not stored refs pending

First and second sound modes at finite temperature in trapped Fermi gases from BCS to BEC

Chih-Chun Chien, K. Levin, Qijin Chen, Yan He

arxiv:0704.1889 v2 · 2007-04-15 · cond-mat.str-el · cond-mat.quant-gas · cond-mat.supr-con

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{O7ZU6IYX2XQSP5DBYCUOWCD2XR}

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	2026-05-18T04:13:46.105973Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

77f34f2317d5e127f461c0a8eb087abc42cf81dad55d895f08c5c24f188188e3

Aliases

arxiv: 0704.1889 · arxiv_version: 0704.1889v2 · doi: 10.48550/arxiv.0704.1889 · pith_short_12: O7ZU6IYX2XQS · pith_short_16: O7ZU6IYX2XQSP5DB · pith_short_8: O7ZU6IYX

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/O7ZU6IYX2XQSP5DBYCUOWCD2XR \
  | 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: 77f34f2317d5e127f461c0a8eb087abc42cf81dad55d895f08c5c24f188188e3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "00f80b9266046dbae9e8d8a00d5f82b04617218ca1550e2c59ec40a36e9bd159",
    "cross_cats_sorted": [
      "cond-mat.quant-gas",
      "cond-mat.supr-con"
    ],
    "license": "",
    "primary_cat": "cond-mat.str-el",
    "submitted_at": "2007-04-15T00:02:39Z",
    "title_canon_sha256": "13d761cdae94883290c9ba99d5b9bbb7eb0c8b34d09145ab392496c8b3dbde77"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0704.1889",
    "kind": "arxiv",
    "version": 2
  }
}