Pith Number

pith:V2UIQJSX

pith:2021:V2UIQJSXCHVCUMGTSHLT2XQV3J

not attested not anchored not stored refs pending

Toward a new fully algebraic preconditioner for symmetric positive definite problems

Nicole Spillane (CMAP)

arxiv:2106.11574 v1 · 2021-06-22 · 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{V2UIQJSXCHVCUMGTSHLT2XQV3J}

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	2026-07-05T02:51:30.786637Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aea888265711ea2a30d391d73d5e15da4de4664473681eb45cc358bc9b33c9d3

Aliases

arxiv: 2106.11574 · arxiv_version: 2106.11574v1 · doi: 10.48550/arxiv.2106.11574 · pith_short_12: V2UIQJSXCHVC · pith_short_16: V2UIQJSXCHVCUMGT · pith_short_8: V2UIQJSX

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/V2UIQJSXCHVCUMGTSHLT2XQV3J \
  | 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: aea888265711ea2a30d391d73d5e15da4de4664473681eb45cc358bc9b33c9d3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "86262932fbd669ef9928d2f243917f50a5ae1b55ddef4936cd900336f58aee51",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2021-06-22T07:15:14Z",
    "title_canon_sha256": "4a723818c812e41ade42ef417e34f784c4d834dd8ca2ba7e4e70bf812fed76fd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2106.11574",
    "kind": "arxiv",
    "version": 1
  }
}