Pith Number

pith:QD6CDER6

pith:2016:QD6CDER6JLKNHTWVFJ7O7RC3DX

not attested not anchored not stored refs pending

Best rational approximation of functions with logarithmic singularities

Alexander Pushnitski, Dmitri Yafaev

arxiv:1601.00882 v1 · 2016-01-05 · math.CA · math.CV · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QD6CDER6JLKNHTWVFJ7O7RC3DX}

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	2026-05-18T01:23:21.388416Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80fc21923e4ad4d3ced52a7eefc45b1de3083bd524f96817a3203c3fd3696b2d

Aliases

arxiv: 1601.00882 · arxiv_version: 1601.00882v1 · doi: 10.48550/arxiv.1601.00882 · pith_short_12: QD6CDER6JLKN · pith_short_16: QD6CDER6JLKNHTWV · pith_short_8: QD6CDER6

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/QD6CDER6JLKNHTWVFJ7O7RC3DX \
  | 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: 80fc21923e4ad4d3ced52a7eefc45b1de3083bd524f96817a3203c3fd3696b2d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "403239f0ea8947f6c4fbdacc4d8d4b2bdeb0d5aa9fe0c6d685587fdfe2891515",
    "cross_cats_sorted": [
      "math.CV",
      "math.FA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2016-01-05T16:04:45Z",
    "title_canon_sha256": "50ad9e46fb02002c62e738e28c177f3189e4138eaba1bfb522bc14dea202351a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.00882",
    "kind": "arxiv",
    "version": 1
  }
}