Pith Number

pith:PWYDFFBA

pith:2016:PWYDFFBAUNIX6V4MO4RK6GI3TL

not attested not anchored not stored refs pending

A scalable preconditioner for a DPG method

Andrew T. Barker, Jay Gopalakrishnan, Tzanio Kolev, Veselin Dobrev

arxiv:1612.00838 v1 · 2016-12-02 · 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{PWYDFFBAUNIX6V4MO4RK6GI3TL}

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	2026-05-18T00:11:19.143931Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7db0329420a3517f578c7722af191b9af9028f7886cfb1aec895740fae0c6efc

Aliases

arxiv: 1612.00838 · arxiv_version: 1612.00838v1 · doi: 10.48550/arxiv.1612.00838 · pith_short_12: PWYDFFBAUNIX · pith_short_16: PWYDFFBAUNIX6V4M · pith_short_8: PWYDFFBA

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/PWYDFFBAUNIX6V4MO4RK6GI3TL \
  | 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: 7db0329420a3517f578c7722af191b9af9028f7886cfb1aec895740fae0c6efc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "02f92aca0cb808a7c5c320a9db6ab22578596656abc27a029db67e99abad7014",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2016-12-02T20:59:29Z",
    "title_canon_sha256": "82d3f693a438dd70bd9ff5fdc19580da3577ceb559f3bdb674076d69052e7731"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.00838",
    "kind": "arxiv",
    "version": 1
  }
}