Pith Number

pith:NJHHUAPZ

pith:1999:NJHHUAPZ62TMLDMVDNVDBULPCC

not attested not anchored not stored refs pending

Object-oriented construction of a multigrid electronic-structure code with Fortran 90

In-Ho Lee, Richard M. Martin, Yong-Hoon Kim

arxiv:physics/9911031 v1 · 1999-11-15 · physics.comp-ph · 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{NJHHUAPZ62TMLDMVDNVDBULPCC}

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	2026-05-18T01:23:32.478086Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a4e7a01f9f6a6c58d951b6a30d16f10801bfbcd1816159293bbd4962423fa5a

Aliases

arxiv: physics/9911031 · arxiv_version: physics/9911031v1 · doi: 10.48550/arxiv.physics/9911031 · pith_short_12: NJHHUAPZ62TM · pith_short_16: NJHHUAPZ62TMLDMV · pith_short_8: NJHHUAPZ

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/NJHHUAPZ62TMLDMVDNVDBULPCC \
  | 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: 6a4e7a01f9f6a6c58d951b6a30d16f10801bfbcd1816159293bbd4962423fa5a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca8828b8889016bcb65d977fb7862742bb59cb6779c8aa82263e2893dbe0e62b",
    "cross_cats_sorted": [
      "cond-mat.mtrl-sci"
    ],
    "license": "",
    "primary_cat": "physics.comp-ph",
    "submitted_at": "1999-11-15T04:21:55Z",
    "title_canon_sha256": "0275a8e969e0383a5afe282fb43aa56308b2bf952555757ada3a7bcaa0f6c1e8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/9911031",
    "kind": "arxiv",
    "version": 1
  }
}