Pith Number

pith:WQB2W6I2

pith:2004:WQB2W6I2F73IUVJXM2OLOESW75

not attested not anchored not stored refs pending

Eigenvalue Estimation of Differential Operators

Daniel S. Abrams, Eli Yablonovitch, Thomas Szkopek, Vwani Roychowdhury

arxiv:quant-ph/0408137 v4 · 2004-08-20 · 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{WQB2W6I2F73IUVJXM2OLOESW75}

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	2026-05-18T01:37:58.419252Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b403ab791a2ff68a5537669cb71256ff486e4f6cb96efc5d3b8cf491e72eb022

Aliases

arxiv: quant-ph/0408137 · arxiv_version: quant-ph/0408137v4 · doi: 10.48550/arxiv.quant-ph/0408137 · pith_short_12: WQB2W6I2F73I · pith_short_16: WQB2W6I2F73IUVJX · pith_short_8: WQB2W6I2

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/WQB2W6I2F73IUVJXM2OLOESW75 \
  | 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: b403ab791a2ff68a5537669cb71256ff486e4f6cb96efc5d3b8cf491e72eb022

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "139a69758bff6b5e10b6b4fa075b11a3987c52b159b9e77cf05984fcba7bd655",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2004-08-20T18:58:19Z",
    "title_canon_sha256": "f3f8a209e09ee1e7d8300b91c73c2cbf098c90f3a4ba2d4df098fc927ca9632d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0408137",
    "kind": "arxiv",
    "version": 4
  }
}