Pith Number

pith:RQHGWZNV

pith:2019:RQHGWZNV4PKAASABFBFHHTTLVQ

not attested not anchored not stored refs pending

On the Convergence Rate of Variants of the Conjugate Gradient Algorithm in Finite Precision Arithmetic

Anne Greenbaum, Hexuan Liu, Tyler Chen

arxiv:1905.05874 v2 · 2019-05-14 · 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{RQHGWZNV4PKAASABFBFHHTTLVQ}

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	2026-06-04T20:14:30.768061Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8c0e6b65b5e3d4004801284a73ce6bac394fff18422feeb29a8989c4f7724916

Aliases

arxiv: 1905.05874 · arxiv_version: 1905.05874v2 · doi: 10.48550/arxiv.1905.05874 · pith_short_12: RQHGWZNV4PKA · pith_short_16: RQHGWZNV4PKAASAB · pith_short_8: RQHGWZNV

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/RQHGWZNV4PKAASABFBFHHTTLVQ \
  | 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: 8c0e6b65b5e3d4004801284a73ce6bac394fff18422feeb29a8989c4f7724916

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c26f4eae8dd0f43dc420f630e1628af9083f8a87f8e16e0c20132528175b6bb4",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-05-14T23:02:17Z",
    "title_canon_sha256": "47d65021e42fd645b26d95d56e1b2d8e0902654325d31ec985ad31306e3b00dc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.05874",
    "kind": "arxiv",
    "version": 2
  }
}