Pith Number

pith:BUYBZQOC

pith:2019:BUYBZQOCW4IGHDFN3TRGJS6CKS

not attested not anchored not stored refs pending

Solving Eigenvalue Problems in a Discontinuous Approximation Space by Patch Reconstruction

Fanyi Yang, Ruo Li, Zhiyuan Sun

arxiv:1901.01803 v2 · 2019-01-07 · math.NA · cs.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BUYBZQOCW4IGHDFN3TRGJS6CKS}

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	2026-07-05T00:21:32.310580Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d301cc1c2b710638caddce264cbc2549c4fe14e59f824b4b1b5fd87cf36674b

Aliases

arxiv: 1901.01803 · arxiv_version: 1901.01803v2 · doi: 10.48550/arxiv.1901.01803 · pith_short_12: BUYBZQOCW4IG · pith_short_16: BUYBZQOCW4IGHDFN · pith_short_8: BUYBZQOC

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/BUYBZQOCW4IGHDFN3TRGJS6CKS \
  | 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: 0d301cc1c2b710638caddce264cbc2549c4fe14e59f824b4b1b5fd87cf36674b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bdfc3035216b77710242df0b2974e6728b224a7faf0f51b5b01244a078ed9b37",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-01-07T13:46:13Z",
    "title_canon_sha256": "9ce67a730f85d1c9bf3a20226bd8b1300841b56d7c079b172ac6363fc6991b7f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.01803",
    "kind": "arxiv",
    "version": 2
  }
}