Pith Number

pith:3UBSEX3H

pith:2009:3UBSEX3HZD774746PALR5UEGTF

not attested not anchored not stored refs pending

Two-stage high frequency pulse tube cooler for refrigeration at 25 K

G. Thummes, M. Dietrich

arxiv:0910.1522 v2 · 2009-10-08 · physics.ins-det

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3UBSEX3HZD774746PALR5UEGTF}

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	2026-05-18T02:34:19.647692Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dd03225f67c8fffe7f9e78171ed0869973370ff002520dcc7e8ed4f146d1e6c8

Aliases

arxiv: 0910.1522 · arxiv_version: 0910.1522v2 · doi: 10.48550/arxiv.0910.1522 · pith_short_12: 3UBSEX3HZD77 · pith_short_16: 3UBSEX3HZD774746 · pith_short_8: 3UBSEX3H

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/3UBSEX3HZD774746PALR5UEGTF \
  | 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: dd03225f67c8fffe7f9e78171ed0869973370ff002520dcc7e8ed4f146d1e6c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba7a56af5cfe26202553145d1961fb5b47be12688959d4662a107bc1336b069e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ins-det",
    "submitted_at": "2009-10-08T14:56:28Z",
    "title_canon_sha256": "d5b22f10a48ed049ebee048a5c56d26893836bb7bc7f6342bfd539c4cc522dc1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.1522",
    "kind": "arxiv",
    "version": 2
  }
}