Pith Number

pith:NJ7OQNLG

pith:2009:NJ7OQNLGQLZZX7YHQP2T2CZ7UM

not attested not anchored not stored refs pending

Sturm-Schroedinger equations: formula for metric

Hendrik B. Geyer, Miloslav Znojil

arxiv:0904.2293 v1 · 2009-04-15 · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NJ7OQNLGQLZZX7YHQP2T2CZ7UM}

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	2026-05-18T02:14:00.264241Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a7ee8356682f39bff0783f53d0b3fa3058c26e5103d67a5de93e2019b84b50f

Aliases

arxiv: 0904.2293 · arxiv_version: 0904.2293v1 · doi: 10.48550/arxiv.0904.2293 · pith_short_12: NJ7OQNLGQLZZ · pith_short_16: NJ7OQNLGQLZZX7YH · pith_short_8: NJ7OQNLG

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/NJ7OQNLGQLZZX7YHQP2T2CZ7UM \
  | 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: 6a7ee8356682f39bff0783f53d0b3fa3058c26e5103d67a5de93e2019b84b50f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "010af1f5e3f3d84f1c11199fe04ec726f7bda141b8297b1041be62a08f32ed95",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-04-15T12:07:23Z",
    "title_canon_sha256": "060f107dd5bf332579583cf4e45d0b37d0accb0317f67a38c9493e8c25a2ba86"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.2293",
    "kind": "arxiv",
    "version": 1
  }
}