Pith Number

pith:UPAW4FWH

pith:2015:UPAW4FWHWJGWWYJXPO5BYKB4JO

not attested not anchored not stored refs pending

An algebraic multigrid method for quadratic finite element equations of elliptic and saddle point systems in 3D

Huidong Yang

arxiv:1503.01287 v1 · 2015-03-04 · math.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{UPAW4FWHWJGWWYJXPO5BYKB4JO}

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	2026-05-18T02:25:39.486883Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3c16e16c7b24d6b61377bba1c283c4bb176ae1125e5bd8a04c14f950a6e1211

Aliases

arxiv: 1503.01287 · arxiv_version: 1503.01287v1 · doi: 10.48550/arxiv.1503.01287 · pith_short_12: UPAW4FWHWJGW · pith_short_16: UPAW4FWHWJGWWYJX · pith_short_8: UPAW4FWH

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/UPAW4FWHWJGWWYJXPO5BYKB4JO \
  | 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: a3c16e16c7b24d6b61377bba1c283c4bb176ae1125e5bd8a04c14f950a6e1211

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7e223f1f2fdcf64a5ea443606a9d3d8ac886d0a82ab35bfa3cdd5c58f7d371f2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-03-04T11:43:47Z",
    "title_canon_sha256": "0484e2ee89f08a90e4b8926d617421036ca266ba91bed52c6f612d39cfac9175"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.01287",
    "kind": "arxiv",
    "version": 1
  }
}