Pith Number

pith:XKO7272H

pith:2015:XKO7272HQQIDNDD6ENPK6WTSMV

not attested not anchored not stored refs pending

A variable metric forward--backward method with extrapolation

Federica Porta, Silvia Bonettini, Valeria Ruggiero

arxiv:1506.02900 v1 · 2015-06-09 · 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{XKO7272HQQIDNDD6ENPK6WTSMV}

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	2026-05-18T01:55:40.603352Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba9dfd7f478410368c7e235eaf5a7265586567b80db3beacbe600dab46998e40

Aliases

arxiv: 1506.02900 · arxiv_version: 1506.02900v1 · doi: 10.48550/arxiv.1506.02900 · pith_short_12: XKO7272HQQID · pith_short_16: XKO7272HQQIDNDD6 · pith_short_8: XKO7272H

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/XKO7272HQQIDNDD6ENPK6WTSMV \
  | 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: ba9dfd7f478410368c7e235eaf5a7265586567b80db3beacbe600dab46998e40

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "10754401e8f6942681caf8f9a62e31b056b981d66a088f19501446caa51953ae",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-06-09T13:28:28Z",
    "title_canon_sha256": "c9ab2a27bcd2b6016affca7db6959861e849456b2c5b1bc1972f7c1977d9be00"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.02900",
    "kind": "arxiv",
    "version": 1
  }
}