Pith Number

pith:E5AHJKRQ

pith:2026:E5AHJKRQJV4K4TEP7LGQ43PIA5

not attested not anchored not stored refs pending

Programming with Chebfun. Case study: Richards equation

Nicolae Suciu

arxiv:2606.18118 v1 · 2026-06-16 · 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{E5AHJKRQJV4K4TEP7LGQ43PIA5}

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	2026-06-19T16:10:48.840924Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

274074aa304d78ae4c8ffacd0e6de8076094b8c2edf0acb98603e92faebdc00f

Aliases

arxiv: 2606.18118 · arxiv_version: 2606.18118v1 · doi: 10.48550/arxiv.2606.18118 · pith_short_12: E5AHJKRQJV4K · pith_short_16: E5AHJKRQJV4K4TEP · pith_short_8: E5AHJKRQ

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/E5AHJKRQJV4K4TEP7LGQ43PIA5 \
  | 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: 274074aa304d78ae4c8ffacd0e6de8076094b8c2edf0acb98603e92faebdc00f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17bf5d2c878a497b1bb8a5f3571077f195dea845ffb527d23d81204228aea9a8",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-06-16T16:20:02Z",
    "title_canon_sha256": "2115000448e737032b78c62b816e2f140f8111dd3405e10f3966f47201d37c1b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.18118",
    "kind": "arxiv",
    "version": 1
  }
}