Pith Number

pith:EJWVDNKU

pith:2009:EJWVDNKUQ7WOGHII7LBRYPKJAD

not attested not anchored not stored refs pending

Sharpening and generalizations of Shafer-Fink's double inequality for the arc sine function

Bai-Ni Guo, Feng Qi

arxiv:0902.3036 v2 · 2009-02-18 · math.CA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EJWVDNKUQ7WOGHII7LBRYPKJAD}

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	2026-05-18T02:52:32.801338Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

226d51b55487ece31d08fac31c3d4900f3b69655f3a36438f57c7f9966c40a17

Aliases

arxiv: 0902.3036 · arxiv_version: 0902.3036v2 · doi: 10.48550/arxiv.0902.3036 · pith_short_12: EJWVDNKUQ7WO · pith_short_16: EJWVDNKUQ7WOGHII · pith_short_8: EJWVDNKU

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/EJWVDNKUQ7WOGHII7LBRYPKJAD \
  | 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: 226d51b55487ece31d08fac31c3d4900f3b69655f3a36438f57c7f9966c40a17

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ed28d243ab9b136e6d9ced675bbdfa5e38a72d62f6b9e98dde0a6d7c2fd5d871",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2009-02-18T02:47:39Z",
    "title_canon_sha256": "3874e94d908b4078b2ab7b95f5d333a136e243c48bcf9fc4893a0fc9e48a17b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.3036",
    "kind": "arxiv",
    "version": 2
  }
}