Pith Number

pith:JL7VT57Z

pith:2015:JL7VT57ZZ3E24Z3GNMSBZO7IAA

not attested not anchored not stored refs pending

A Robust Approximation to a Lambert-Type Function

Ken Roberts

arxiv:1504.01964 v1 · 2015-04-08 · 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{JL7VT57ZZ3E24Z3GNMSBZO7IAA}

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	2026-05-18T02:19:17.672390Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4aff59f7f9cec9ae67666b241cbbe80023e620aef39b0860d66f01dd354f824c

Aliases

arxiv: 1504.01964 · arxiv_version: 1504.01964v1 · doi: 10.48550/arxiv.1504.01964 · pith_short_12: JL7VT57ZZ3E2 · pith_short_16: JL7VT57ZZ3E24Z3G · pith_short_8: JL7VT57Z

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/JL7VT57ZZ3E24Z3GNMSBZO7IAA \
  | 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: 4aff59f7f9cec9ae67666b241cbbe80023e620aef39b0860d66f01dd354f824c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fc1a8b62d1a3ca54119571d7cf485dff1d08cdfef1e3a2c191c467673053f0c6",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-04-08T13:45:24Z",
    "title_canon_sha256": "11fb455ef0882c7805f27f162928a66fa93ef9898cfb49e2a750db0823b9eb88"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.01964",
    "kind": "arxiv",
    "version": 1
  }
}