Pith Number

pith:EPTKNEIL

pith:2006:EPTKNEILXFAIFKBQRCYNQIRX6D

not attested not anchored not stored refs pending

The probability that a small perturbation of a numerical analysis problem is difficult

Felipe Cucker, Martin Lotz, Peter Buergisser

arxiv:math/0610270 v1 · 2006-10-09 · math.NA · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EPTKNEILXFAIFKBQRCYNQIRX6D}

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	2026-05-18T01:38:23.721013Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

23e6a6910bb94082a83088b0d82237f0c35eb393d36e1c4908997df89096a4bf

Aliases

arxiv: math/0610270 · arxiv_version: math/0610270v1 · doi: 10.48550/arxiv.math/0610270 · pith_short_12: EPTKNEILXFAI · pith_short_16: EPTKNEILXFAIFKBQ · pith_short_8: EPTKNEIL

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/EPTKNEILXFAIFKBQRCYNQIRX6D \
  | 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: 23e6a6910bb94082a83088b0d82237f0c35eb393d36e1c4908997df89096a4bf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a75de7c74f04eb6049d406bf36958456c1d1e267bbb5c4ab46ca514cfac8f1a4",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "",
    "primary_cat": "math.NA",
    "submitted_at": "2006-10-09T04:40:18Z",
    "title_canon_sha256": "273cb74f1fce43e6376643ea6860497f72167be92b135fdbd0cafe3c8eddf04d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0610270",
    "kind": "arxiv",
    "version": 1
  }
}